Lesson 5-4: Proportions Check Up

Write and solve a proportion for this scenario.

If Shane can bake 120 dozen cookies in five days, how many days would it take to bake 800 dozen cookies?

• about 34 days

• about 30 days

• about 12 days

• about 7 days

Solve the proportion.

• k=5
• k=3.3333333
• k=60
• k=90

We solve proportions by ​ ​ (a)   and ​ (b)  

• cross multiplying
• dividing
• cross dividing
• multiplying
• cross adding
• subtracting
• cross subtracting
• adding

Two ratios that are equal are:

• similar sides
• unit rates
• congruent
• proportional

A car travels 120 miles in 3 hours (with a constant speed).  How long will it take a car to travel 200 miles?

What is the correct proportion to solve this problem?

It takes Mike 18 minutes to finish reading 4 pages of a book.  If Mike reads each page at the same pace, how long does it take for him to finish reading 30 pages?

If Justin can type 408 words in 4 minutes, how many words can he type per minute?

• 102 words per minute
• 100 words per minute
• 400 words per minute
• 412 words per minute

Ms. Hensley's family owns a green bean farm. If Ms. Hensley can grow 225 bushels in 3 acres, how many bushels can she grow in 9.6 acres?

• 720 bushels

• 675 bushels

• 75 bushels

A cake recipe calls for 1.5 cups of milk and 3 cups of flour. Seth made a mistake and used 5 cups of flour. How many cups of milk should he use to keep the proportions correct?

• 2.5 cups milk
• 1.75 cups milk
• 2 cups flour
• 2.25 cups milk

Solve for x 

• x = 16
• x = 28
• x = 1/26
• x = 26