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Finding the Fourth Proportional to 381,358.76, 572,042.20 and 115,121.48

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Solution

The fourth proportional to 381,358.76, 572,042.20 and 115,121.48 is: 172,683.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,358.76 : 572,042.20 = 115,121.48 : x
  2. Step 2: Convert to fraction form
    381,358.76/572,042.20 = 115,121.48/x
  3. Step 3: Cross multiply
    381,358.76x = 572,042.20 × 115,121.48
  4. Step 4: Simplify right side
    381,358.76x = 65,854,344,686.46
  5. Step 5: Solve for x
    x = 65,854,344,686.46/381,358.76
  6. Step 6: Final answer
    x = 172,683.45

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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.