Solving Proportions

What is a proportion?

• When two ratios can be simplified
• When two ratios are equivalent and show the same value
• When two ratios have the exact same numbers
• When two ratios can be multiplied by 2

Tags

CCSS.7.RP.A.2A

How do you find the missing number in a proportion?

• Add Straight Across

• Subtract Straight Across

• Cross Divide

• Cross Multiply (Cross Product)

Tags

CCSS.7.RP.A.2B

Solve the proportion:

• 4

• 8

• 14

• 10

Tags

CCSS.7.RP.A.2B

Solve the proportion.

• 1
• 3
• 6
• 5

Tags

CCSS.7.RP.A.2B

Solve for x 

• x = 16
• x = 28
• x = 1/26
• x = 26

Tags

CCSS.7.RP.A.2C

Solve for x 

• x = 15
• x = 11
• x = 1/11
• x = 20

Tags

CCSS.6.EE.B.5

CCSS.6.EE.B.7

Do the ratios form a proportion?

• Yes, they form a proportion.
• No, they do not form a proportion.

Tags

CCSS.6.RP.A.3A

Solve for x

• x=6
• x =1/6
• x = 7
• x=9

Tags

CCSS.7.RP.A.2C

Do the ratios form a proportion?

• Yes, they form a proportion.
• No, they do not form a proportion.

Tags

CCSS.6.RP.A.3A

Solve:

• 4

• 32

• 2

• 9

Tags

CCSS.6.EE.A.1