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Finding the Fourth Proportional to 520,890.60, 781,335.90 and 126,906.60

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Solution

The fourth proportional to 520,890.60, 781,335.90 and 126,906.60 is: 190,359.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,890.60 : 781,335.90 = 126,906.60 : x
  2. Step 2: Convert to fraction form
    520,890.60/781,335.90 = 126,906.60/x
  3. Step 3: Cross multiply
    520,890.60x = 781,335.90 × 126,906.60
  4. Step 4: Simplify right side
    520,890.60x = 99,156,682,526.94
  5. Step 5: Solve for x
    x = 99,156,682,526.94/520,890.60
  6. Step 6: Final answer
    x = 190,359.90

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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.