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Finding the Fourth Proportional to 521,011.60, 781,517.40 and 254,942.80

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Solution

The fourth proportional to 521,011.60, 781,517.40 and 254,942.80 is: 382,414.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,011.60 : 781,517.40 = 254,942.80 : x
  2. Step 2: Convert to fraction form
    521,011.60/781,517.40 = 254,942.80/x
  3. Step 3: Cross multiply
    521,011.60x = 781,517.40 × 254,942.80
  4. Step 4: Simplify right side
    521,011.60x = 199,242,234,204.72
  5. Step 5: Solve for x
    x = 199,242,234,204.72/521,011.60
  6. Step 6: Final answer
    x = 382,414.20

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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.