SAP Message VL266 - Quantities &1 and &2 cannot be represented by conv. factors &3 and &4

Diagnosis
You have entered conversion ratio &v1& : &v2 = &v3& : &v4& for amountsV1 and v2. the two ratios deviate, however.
The difference between the two ratios is greater than 0.000001, whichpresents a consistency problem regarding quantity information.

System Response
Adjust one of the factors in the above equation so that it works outmathematically exact (deviation of less than 0.000001).