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Finding the Fourth Proportional to 521,562.30, 781,359.30 and 486,132.90

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Solution

The fourth proportional to 521,562.30, 781,359.30 and 486,132.90 is: 728,282.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,562.30 : 781,359.30 = 486,132.90 : x
  2. Step 2: Convert to fraction form
    521,562.30/781,359.30 = 486,132.90/x
  3. Step 3: Cross multiply
    521,562.30x = 781,359.30 × 486,132.90
  4. Step 4: Simplify right side
    521,562.30x = 379,844,462,450.97
  5. Step 5: Solve for x
    x = 379,844,462,450.97/521,562.30
  6. Step 6: Final answer
    x = 728,282.05

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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.