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Finding the Fourth Proportional to 521,702.20, 782,553.30 and 255,325.60

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Solution

The fourth proportional to 521,702.20, 782,553.30 and 255,325.60 is: 382,988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,702.20 : 782,553.30 = 255,325.60 : x
  2. Step 2: Convert to fraction form
    521,702.20/782,553.30 = 255,325.60/x
  3. Step 3: Cross multiply
    521,702.20x = 782,553.30 × 255,325.60
  4. Step 4: Simplify right side
    521,702.20x = 199,805,890,854.48
  5. Step 5: Solve for x
    x = 199,805,890,854.48/521,702.20
  6. Step 6: Final answer
    x = 382,988.40

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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.