Basic Mathematics for College Students

Solve each proportion. Check each result.See Example 6.

41. 
    
    
    
    42. 
        
    
    
    
    


42. 
    
    
    
    44. 
        
    
    
    
    

Solve each proportion. Check each result.See Example 7.

45. 
    
    
    
    46. 
        
    
    
    
    


46. 
    
    
    
    48. 
        
    
    
    
    

Solve each proportion. Check each result. Write each result as a

fraction or mixed number.See Example 8.

49. 
    
    
    
    50. 
        
    
    
    
    


50. 
    
    
    
    52. 
        
    
    
    
    

Solve each proportion.

53. 
    
    
    
    54. 
        
    
    
    
    


54. 
    
    
    
    56. 
        
    
    
    
    


55. 
    
    
    
    58. 
        
    
    
    
    


56. 
    
    
    
    60. 
        
    
    
    
    


57. 
    
    
    
    62. 
        
    
    
    
    


58. 
    
    
    
    64. 
        
    
    
    
    


59. 
    
    
    
    66. 
        
    
    
    
    

480

36



x

15

340

51



x

27

x

2

1

4



1

2

1

5

x

4

1

10



3

3

4

1

7

8

0.9

0.3



6

x

0.8

2



x

5

8.5

x



4.25

1.7

x

2.5



3.7

9.25

x

200



1,800

600

x

800



900

200

15

10



x

1

3

12

6



x

1

4

0.4

1.6



96.7

x

4,000

x



3.2

2.8

TRY IT YOURSELF

x

2

2

3



1

1

20

3

1

2

x

1

1

6



2

5

8

3

1

2

x

3

1

3



1

1

2

1

9

11

x

1

1

2



10

1

2

4

1

2

9.8

x



2.8

5.4

2.75

x



1.5

1.2

0.4

3.4



x

13.6

0.6

9.6



x

4.8

3

6



x

8

2

3



x

6

7

14



2

x

5

10



3

c

67. 
    
    
    
    68. 
        
    
    
    
    


68. 
    
    
    
    70. 
        
    
    
    
    


69. 
    
    
    
    72. 
        
    
    
    
    

To solve each problem, write and then solve a proportion.

73. SCHOOL LUNCHES A manager of a school
    cafeteria orders 750 pudding cups. What will the
    order cost if she purchases them wholesale, 6 cups
    for $1.75?


74. CLOTHES SHOPPING As part of a spring
    clearance, a men’s store put dress shirts on sale,
    2 for $25.98. How much will a businessman pay
    if he buys five shirts?


75. ANNIVERSARY GIFTS A florist sells a dozen
    long-stemmed red roses for $57.99. In honor of
    their 16th wedding anniversary, a man wants to
    buy 16 roses for his wife. What will the roses cost?
    (Hint:How many roses are in one dozen?)


76. COOKING A recipe for spaghetti sauce requires
    four 16-ounce bottles of ketchup to make 2 gallons
    of sauce. How many bottles of ketchup are needed to
    make 10 gallons of sauce? (Hint:Read the problem
    very carefully.)


77. BUSINESS PERFORMANCE The following
    bar graph shows the yearly costs and the revenue
    received by a business. Are the ratios of costs to
    revenue for 2009 and 2010 equal?

10

20

30

5

15

25

Thousands of dollars

2009 2010

Costs

Revenue

APPLICATIONS

7

8

1

2



0.25

x

3

4

1

2



0.25

x

8.6

2.4



x

6

4.65

7.8



x

5.2

5

x



2

4.4

0.4

1.2



6

x

440 Chapter 5 Ratio, Proportion, and Measurement