Page 189 - Math Course 1 (Book 1)

Proportions

Real World Example Convert Measurements

PLANES SCHOOL
A model of a jet airplane has a length of 9 inches The gymnasium in a new school building
and a wingspan of 6 inches. Find the wingspan of measures 55 feet in length. Find the length of the
the actual plane if the length is 120 feet. gymnasium in centimeters if 1 ft = 30.48
centimeters.
A. 180 ft
B. 80 ft A. 1676.4 cm
C. 720 ft B. 1.8 cm
D. 18 ft C. 0.55 cm
D. 1804.5 cm
Answer
Answer

Skill Practice!

Determine whether the set of numbers in each table are proportional.
1 4 3 12 4 9 12 18
1. , 2. , 3. , 4. ,
5 20 8 32 5 10 20 30

3 27 10 2 4 2 15 10
5. , 6. , 7. , 8. ,
4 36 18 9 9 3 18 12

ALGEBRA Solve each proportion.

8 t n 4 3 12 25 s
9. = 10. = 11. = 12. =
4 8 9 18 v 32 60 12

21 3 c 5 2 6
13. = 14. = 15. =
28 w 12 6 9 k

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