Finding the Fourth Proportional to 728,721.50, 1,005,635.55 and 406,424.68
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Solution
The fourth proportional to 728,721.50, 1,005,635.55 and 406,424.68 is: 560,865.99
Step by Step Solution
- Step 1: Write the proportion equation
728,721.50 : 1,005,635.55 = 406,424.68 : x - Step 2: Convert to fraction form
728,721.50/1,005,635.55 = 406,424.68/x - Step 3: Cross multiply
728,721.50x = 1,005,635.55 × 406,424.68 - Step 4: Simplify right side
728,721.50x = 408,715,103,329.24 - Step 5: Solve for x
x = 408,715,103,329.24/728,721.50 - Step 6: Final answer
x = 560,865.99
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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.