Objective - To use proportions to solve problems.

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Presentation transcript:

Objective - To use proportions to solve problems. Proportion - A statement of equality between two ratios. extremes means Solve for x. 1) 2)

Solve the proportions below. 1) 2)

Solve the proportions below. 3) 4)

Incorrect Proportions x 6’ 25’ 5’ Correct Proportions Incorrect Proportions

Proportions are similar to analogies. Green x Sacramento Wash. D.C. = = Grass Sky California x x = Blue x = U.S.A. Hand Shoe = Glove x x = Foot x = Shoebox or Closet

If it takes 6 cups of flour to make 54 cookies, how many cookies can be made with 10 cups? Let x = the number of cookies cups 6 10 = cookies 54 x 6x = 540 6 6 x = 90 cookies

A factory can produce 91 widgets in 7 hours. How many widgets can it produce in 12 hours? Let x = the number of widgets widgets 91 x = hours 7 12 91(12) = 7x 1092 = 7x 7 7 156 = x x = 156 widgets