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CBSE Class 6 Answered

the first , third and fourth terms of a proportion are 15,40 and 120 respectively.find the second term
Asked by sshivkm | 09 Mar, 2016, 10:16: AM
answered-by-expert Expert Answer
begin mathsize 16px style L e t space t h e space s e c o n d space t e r m space b e space x. T h u s comma space 15 comma space x comma space 40 space a n d space 120 space a r e space i n space p r o p o r t i o n. P r o d u c t space o f space e x t r e m e space t e r m s equals 15 cross times 120 P r o d u c t space o f space m e a n space t e r m s equals x cross times 40 S i n c e comma space n u m b e r s space a r e space i n space p r o p o r t i o n comma 15 cross times 120 equals x cross times 40 rightwards double arrow x equals fraction numerator 15 cross times 120 over denominator 40 end fraction equals 45 T h u s comma space t h e space s e c o n d space t e r m space i s space 45. end style
Answered by Rashmi Khot | 09 Mar, 2016, 11:21: AM

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