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Finding the Fourth Proportional to 487,717.20, 731,230.20 and 221,605.20

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Solution

The fourth proportional to 487,717.20, 731,230.20 and 221,605.20 is: 332,250.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,717.20 : 731,230.20 = 221,605.20 : x
  2. Step 2: Convert to fraction form
    487,717.20/731,230.20 = 221,605.20/x
  3. Step 3: Cross multiply
    487,717.20x = 731,230.20 × 221,605.20
  4. Step 4: Simplify right side
    487,717.20x = 162,044,414,717.04
  5. Step 5: Solve for x
    x = 162,044,414,717.04/487,717.20
  6. Step 6: Final answer
    x = 332,250.77

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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.