If you mean 15 and 45 then the ratio is: 1 to 3
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1545
It is 1/545.
603.515625 inches or50.29296875 feetor16.764322916 yards
1545 cm = 15.45 meters
Without an equality sign and not knowing the plus or minus values of 5 and 1545 it can't be considered to be an equation.