Finding the Fourth Proportional to 687,117.76, 947,828.55 and 428,545.79
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Solution
The fourth proportional to 687,117.76, 947,828.55 and 428,545.79 is: 591,147.49
Step by Step Solution
- Step 1: Write the proportion equation
687,117.76 : 947,828.55 = 428,545.79 : x - Step 2: Convert to fraction form
687,117.76/947,828.55 = 428,545.79/x - Step 3: Cross multiply
687,117.76x = 947,828.55 × 428,545.79 - Step 4: Simplify right side
687,117.76x = 406,187,934,002.04 - Step 5: Solve for x
x = 406,187,934,002.04/687,117.76 - Step 6: Final answer
x = 591,147.49
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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.