Finding the Fourth Proportional to 728,489.97, 1,005,321.58 and 406,220.94
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Solution
The fourth proportional to 728,489.97, 1,005,321.58 and 406,220.94 is: 560,587.92
Step by Step Solution
- Step 1: Write the proportion equation
728,489.97 : 1,005,321.58 = 406,220.94 : x - Step 2: Convert to fraction form
728,489.97/1,005,321.58 = 406,220.94/x - Step 3: Cross multiply
728,489.97x = 1,005,321.58 × 406,220.94 - Step 4: Simplify right side
728,489.97x = 408,382,676,214.33 - Step 5: Solve for x
x = 408,382,676,214.33/728,489.97 - Step 6: Final answer
x = 560,587.92
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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.