Question

what must be added to each of the number 4 ,7 , 26 , 40 to get the number which are in proportion​

Answer 1

Answer:

1. (4+x):(7+x)::(26+x):(40+x)
2. (4+x)(40+x)=(26+x)(7+x) (PRODUCT OF MEANS = PRODUCT OF EXTREMES)
3. 160+40x+4x+x^2=182+26x+7x+x^2
4. 160+44x=182+33x ( x ^2 get cancelled)
5. 44x- 33x=182- 160
6. 11x=22
7. x=11/22
8. x=2

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