Solving Proportions with Scale Factor

What are the 3 ratios you can create comparing figure A to similar figure B.

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How can you set up a relationship between 2 sides to find X? (2 answers)

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• None of the above

Tags

CCSS.HSG.SRT.A.2

How can a value be found to use as the numerator and denominator in the Giant One?

• Look for a number that is between 4 and 6. This is the number you put in the numerator and denominator. For example, 5 would be the Giant One.

• You can't find the Giant One.

• Look for a number so that 4 multiplied by the value will equal 6. You can work backwards: 6 ÷ 4 = 1.5. 1.5 is the numerator and denominator in the Giant One.

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Solve the proportion. When you find x, replace the value in the original proportion to confirm that the two ratios are equal.

• x = 10.5

• x = 15

• x = 31.5

• x = 30

Tags

CCSS.7.RP.A.2C

If an apple juice container leaks 3 ounces every 19 minutes, how long will it take for the 16 ounces of juice in the container to leak out? Write a proportional equation and solve using the giant one.

• 200.2 minutes

• 98 minutes

• 101.3 minutes

• 143.6 minutes

Tags

CCSS.7.RP.A.3

The grocery store sells 3 limes for 99 cents. At this rate, how much will a dozen (12) limes cost? Determine the answer and if it is proportional or not.

• Not proportional. $3.96

• Proportional. $4.63

• Not Proportional. $4.63

• Proportional. $3.96

Tags

CCSS.7.RP.A.2A

Which sides correspond with one another?

• 6 and 1

• 1 and 4

• 4 and 1

• 5 and 3

Tags

CCSS.HSG.SRT.A.2

What do you do when a proportion doesn't have an obvious relationship/scale factor)?

• Cry :(

• Guess

• Hope for the best

• Simplify or scale up, THEN look for a relationship!

Solve the proportion.

• 42

• 6

• 2

• 28

Tags

CCSS.7.RP.A.2B

• 27
• 12
• 1.333
• 3.67

Tags

CCSS.7.RP.A.2B