7th Grade Math

288 Proportions and Similarity

= Step-by-Step Solutions begin on page R1.

Extra Practice begins on page EP2.

Example 1 GEOGRAPHY Find the actual distance between each pair of locations in

South Carolina. Use a ruler to measure.

27 mi

0 1 cm

Hollywood Charleston

Sumter

Congaree Swamp

National Monument

Columbia

ATLANTIC

OCEAN

26

26

20

95

95

77

SOUTH

CAROLINA

GEORGIA

10. Columbia and Charleston 11. Hollywood and Sumter


11. Congaree Swamp and Charleston 13. Sumter and Columbia

Examples 2 and 3 Find the length of each model. Then find the scale factor.

14. 87 ft

2 in. = 15 ft

1515

0.5 cm = 1.5 m

36 m

16.

1 02 03 04 05 04 03 02 01 0

1 02 03 04 05 04 03 02 01 0

End Zone

End Zone

120 yd

1 in. = 20 yd

17.

5 in.^78

1 in. = 0.5 in.

Example 4 18. A model of an

112 

1 

(^34) 
apartment is shown
where _^14 inch
represents 3 feet in the
actual apartment.
a. What is the actual
length of the living
room?
b. Find the actual
dimensions of
the master
bedroom.
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