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Finding the Fourth Proportional to 487,430.40, 731,160.56 and 132,451.92

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Solution

The fourth proportional to 487,430.40, 731,160.56 and 132,451.92 is: 198,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,430.40 : 731,160.56 = 132,451.92 : x
  2. Step 2: Convert to fraction form
    487,430.40/731,160.56 = 132,451.92/x
  3. Step 3: Cross multiply
    487,430.40x = 731,160.56 × 132,451.92
  4. Step 4: Simplify right side
    487,430.40x = 96,843,620,000.28
  5. Step 5: Solve for x
    x = 96,843,620,000.28/487,430.40
  6. Step 6: Final answer
    x = 198,681.95

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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.