Finding the Fourth Proportional to 728,809.79, 1,005,761.21 and 402,134.09
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Solution
The fourth proportional to 728,809.79, 1,005,761.21 and 402,134.09 is: 554,947.08
Step by Step Solution
- Step 1: Write the proportion equation
728,809.79 : 1,005,761.21 = 402,134.09 : x - Step 2: Convert to fraction form
728,809.79/1,005,761.21 = 402,134.09/x - Step 3: Cross multiply
728,809.79x = 1,005,761.21 × 402,134.09 - Step 4: Simplify right side
728,809.79x = 404,450,861,901.17 - Step 5: Solve for x
x = 404,450,861,901.17/728,809.79 - Step 6: Final answer
x = 554,947.08
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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.