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Finding the Fourth Proportional to 487,456.40, 731,616.60 and 287,526.80

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Solution

The fourth proportional to 487,456.40, 731,616.60 and 287,526.80 is: 431,545.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,456.40 : 731,616.60 = 287,526.80 : x
  2. Step 2: Convert to fraction form
    487,456.40/731,616.60 = 287,526.80/x
  3. Step 3: Cross multiply
    487,456.40x = 731,616.60 × 287,526.80
  4. Step 4: Simplify right side
    487,456.40x = 210,359,379,824.88
  5. Step 5: Solve for x
    x = 210,359,379,824.88/487,456.40
  6. Step 6: Final answer
    x = 431,545.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.