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Finding the Fourth Proportional to 521,737.20, 782,605.80 and 255,360.60

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Solution

The fourth proportional to 521,737.20, 782,605.80 and 255,360.60 is: 383,040.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,737.20 : 782,605.80 = 255,360.60 : x
  2. Step 2: Convert to fraction form
    521,737.20/782,605.80 = 255,360.60/x
  3. Step 3: Cross multiply
    521,737.20x = 782,605.80 × 255,360.60
  4. Step 4: Simplify right side
    521,737.20x = 199,846,686,651.48
  5. Step 5: Solve for x
    x = 199,846,686,651.48/521,737.20
  6. Step 6: Final answer
    x = 383,040.90

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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.