Finding the Fourth Proportional to 721,659.31, 995,865.15 and 399,382.99
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Solution
The fourth proportional to 721,659.31, 995,865.15 and 399,382.99 is: 551,134.86
Step by Step Solution
- Step 1: Write the proportion equation
721,659.31 : 995,865.15 = 399,382.99 : x - Step 2: Convert to fraction form
721,659.31/995,865.15 = 399,382.99/x - Step 3: Cross multiply
721,659.31x = 995,865.15 × 399,382.99 - Step 4: Simplify right side
721,659.31x = 397,731,601,243.80 - Step 5: Solve for x
x = 397,731,601,243.80/721,659.31 - Step 6: Final answer
x = 551,134.86
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.