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Finding the Fourth Proportional to 521,124.10, 781,686.15 and 513,250.90

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Solution

The fourth proportional to 521,124.10, 781,686.15 and 513,250.90 is: 769,876.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,124.10 : 781,686.15 = 513,250.90 : x
  2. Step 2: Convert to fraction form
    521,124.10/781,686.15 = 513,250.90/x
  3. Step 3: Cross multiply
    521,124.10x = 781,686.15 × 513,250.90
  4. Step 4: Simplify right side
    521,124.10x = 401,201,120,005.04
  5. Step 5: Solve for x
    x = 401,201,120,005.04/521,124.10
  6. Step 6: Final answer
    x = 769,876.35

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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.