Chapter 5 Ratios and Proportions

There are 4 triangles, 12 squares, and 6 circles.  What is the ratio of triangles to squares? Simplify.

• 12 : 4

• 2 to 6

• 1 : 3

Express the following ratio in simplest form:

20:45

• 10:22.5

• 4:9

• 40:90

• 5:9

Express the following ratio in simplest form:

• 4:10

• 8:20

• 2:5

• 5:2

Solve the proportion:

• 4

• 8

• 14

• 10

• none of these

Lucy spends $1.75 on a cup of coffee each day. Fill in the following table to represent a proportional relationship.

b

d

e

a

$3.00

$10.50

$1.75

$8.75

$12.25

$7.00

$5.25

$3.50

Two quantities are ​ (a)   if the ratios comparing them are equivalent.

• proportional

• nonproportional

• constant of proportionality

• proportion

Two quantities are in a ​ (a)   if the two quantities vary and have a constant ratio between them.

• proportional relationship

• proportional

• unit rate

• nonproportional

• constant of proportionality

When two ratios are equal they are .

(a)  

• Proportional

• Ratio

• Rate

• Unit Rate

Solve the proportion:

• 15

• 5

• 10

• 12

Are the two ratios proportional?

• YES

• NO