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Finding the Fourth Proportional to 521,105.40, 781,658.10 and 240,469.56

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Solution

The fourth proportional to 521,105.40, 781,658.10 and 240,469.56 is: 360,704.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,105.40 : 781,658.10 = 240,469.56 : x
  2. Step 2: Convert to fraction form
    521,105.40/781,658.10 = 240,469.56/x
  3. Step 3: Cross multiply
    521,105.40x = 781,658.10 × 240,469.56
  4. Step 4: Simplify right side
    521,105.40x = 187,964,979,377.44
  5. Step 5: Solve for x
    x = 187,964,979,377.44/521,105.40
  6. Step 6: Final answer
    x = 360,704.34

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1.5x scale

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.