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.

Presentation on theme: "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."— Presentation transcript:

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.

PROPERTIES OF PROPORTIONS RECIPROCAL PROPERTY CROSS PRODUCT PROPERTY

Check Solutions

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.

EX

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

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

Download ppt "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."

Similar presentations