Proportions

What is a proportion?

• A proportion is some math unit that we may or may not need in the future

• A proportion is a name we give to a statement that two ratios are equal. Ex., c:b = a:a.

• A proportion is numbers and/or variables being multiplied, divided, added, but not subtracted. Ex., 1 + a = -14

• A proportion is a name we give to a statement that two ratios are equal. Ex., a:b = c:d.

Does this form a proportion?

• No

• Yes

• Maybe

• I don't know

Solve the proportion

• {36.0}

• {37}

• {3.6}

• {36}

Does this form a proportion?

• No

• I don't know

• Maybe

• Yes

Solve the problem:

• 42.9 tons

• 43 tons

• 42.9 miles

• 45.6 miles

Solve the proportion:

• 67 m

• 7.7 m

• 6.7 m

• 4.2 m

Solve the proportion:

• $65.1

• $1.56

• $3.52

• $8.21

Find the missing side by setting up and solving a proportion:

• 100

• 14

• 12

• 10

Find the missing side by setting up and solving a proportion:

• 3

• 13

• -3

• 10

Set up and solve the proportion based on the image:

• 2.1 in.

• 2 in.

• 9 in.

• -2 in.