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Finding the Fourth Proportional to 487,730, 731,581.26 and 132,747.10

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Solution

The fourth proportional to 487,730, 731,581.26 and 132,747.10 is: 199,116.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,730 : 731,581.26 = 132,747.10 : x
  2. Step 2: Convert to fraction form
    487,730/731,581.26 = 132,747.10/x
  3. Step 3: Cross multiply
    487,730x = 731,581.26 × 132,747.10
  4. Step 4: Simplify right side
    487,730x = 97,115,287,021.44
  5. Step 5: Solve for x
    x = 97,115,287,021.44/487,730
  6. Step 6: Final answer
    x = 199,116.90

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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.