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Eive numbers arelast term is Ro. Find these num bersin conb |
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Answer» Continued proportion : Three numbers ‘a’, ‘b’ and ‘c’ are said to be continued proportion if a, b and c are in proportion. Thus, if a, b and c are in continued-proportion, then a,b,b,c are in proportion, that means Product of extremes = Product of means ⇒ a x c = b x b ⇒ a x c = b 2 Continued-proportion is also known as mean proportional .If ‘b’ is a mean proportional between a and c then b 2 = ac. Examples : 1)Find the mean proportional between 9 and 25.Solution : Let x be the mean proportional between 9 and 25.⇒ x 2 = 9 x 25 ⇒ x 2 = 225 ⇒ x = 15 Hence, the mean proportional between 9 and 25 is 15. |
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