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Published byJoleen Marylou Chandler Modified over 8 years ago

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11.1 Ratios and Proportions Solve proportions. Proportion – equates two ratios extreme mean This proportion is read as “a is to b as c is to d.” You must check your solutions in the original problem because it is possible to get an extraneous solution which does not satisfy the original equation.

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PROPERTIES OF PROPORTIONS RECIPROCAL PROPERTY CROSS PRODUCT PROPERTY

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Check Solutions

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and Don’t forget to check your answers in the original proportion to see if you have an extraneous solution. is the only answer because you cannot have 0 in the denominator of a fraction.

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EX

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-4x -4x x + 15 = 0 -15 -15

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and +5x +15 +5x +15 EX:

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