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Finding the Fourth Proportional to 521,710.70, 782,566.05 and 255,512.30

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Solution

The fourth proportional to 521,710.70, 782,566.05 and 255,512.30 is: 383,268.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,710.70 : 782,566.05 = 255,512.30 : x
  2. Step 2: Convert to fraction form
    521,710.70/782,566.05 = 255,512.30/x
  3. Step 3: Cross multiply
    521,710.70x = 782,566.05 × 255,512.30
  4. Step 4: Simplify right side
    521,710.70x = 199,955,251,337.42
  5. Step 5: Solve for x
    x = 199,955,251,337.42/521,710.70
  6. Step 6: Final answer
    x = 383,268.45

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Similar ratio
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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.