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Finding the Fourth Proportional to 521,753.20, 782,629.80 and 255,376.60

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Solution

The fourth proportional to 521,753.20, 782,629.80 and 255,376.60 is: 383,064.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,753.20 : 782,629.80 = 255,376.60 : x
  2. Step 2: Convert to fraction form
    521,753.20/782,629.80 = 255,376.60/x
  3. Step 3: Cross multiply
    521,753.20x = 782,629.80 × 255,376.60
  4. Step 4: Simplify right side
    521,753.20x = 199,865,337,382.68
  5. Step 5: Solve for x
    x = 199,865,337,382.68/521,753.20
  6. Step 6: Final answer
    x = 383,064.90

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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.