Hello, MathLearner!

2. The weights of 3 heaps of gold are in the ratio 5:6:7.

By what fractions of themselves must the first two be increased

so that the ratio of the weights is changed to 7:6:5 ?

Ans:

The original weight are: .

The new weights are: .

The third weight is not changed: .

Substitute into [2]: .

The first weight went from , an increase of: .

. . The fraction of increase is: .

The second weight went from to , an increase of: .

. . The fraction of increase is: .