Solving Proportions through Scale Factor

What is a proportion in mathematical terms?

• A method of solving quadratic equations

• A type of equation involving addition

• A comparison of two numbers by division

• Two ratios set equal to each other

Tags

CCSS.7.RP.A.2A

How can the relationship between two ratios in a proportion be determined?

• Through addition or subtraction

• Using multiplication or division

• By graphing on a coordinate plane

• Applying calculus principles

If a ratio of 3:5 is scaled up to 27:X, what is the value of X?

• 15

• 45

• 9

• 27

In a proportion, if the numerator is multiplied by 3 to get from 3 to 9, what should the denominator be multiplied by to maintain equality?

• 6

• 9

• 1

• 3

Tags

CCSS.7.RP.A.2B

How do you find a missing value in a proportion when given one complete and one incomplete ratio?

• Subtract the known values

• Divide the larger number by the smaller

• Multiply or divide to find the equivalent scaling factor

• Use a proportion calculator

Tags

CCSS.7.RP.A.2B

What is the missing value X in the proportion 5/2 = 45/X?

• 18

• 9

• 4.5

• 22.5

Tags

CCSS.7.RP.A.2B

If the ratio of M&Ms to Skittles sold is 3:5 and 25 Skittles are sold, how many M&Ms are sold?

• 15

• 25

• 45

• 5

How many ounces of tuna would 28 cats eat if 7 cats eat 56 ounces?

• 56 ounces

• 112 ounces

• 224 ounces

• 28 ounces

Tags

CCSS.6.RP.A.3B

If Leah answers 14 out of 20 questions correctly, how many would she answer correctly out of 30?

• 14

• 28

• 18

• 21

How much money would Sally make for selling nine lollipops if she makes $24 from four?

• $54

• $72

• $36

• $18

Tags

CCSS.6.RP.A.3B