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Finding the Fourth Proportional to 520,909.20, 781,363.80 and 458,701.20

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Solution

The fourth proportional to 520,909.20, 781,363.80 and 458,701.20 is: 688,051.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,909.20 : 781,363.80 = 458,701.20 : x
  2. Step 2: Convert to fraction form
    520,909.20/781,363.80 = 458,701.20/x
  3. Step 3: Cross multiply
    520,909.20x = 781,363.80 × 458,701.20
  4. Step 4: Simplify right side
    520,909.20x = 358,412,512,696.56
  5. Step 5: Solve for x
    x = 358,412,512,696.56/520,909.20
  6. Step 6: Final answer
    x = 688,051.80

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Similar ratio
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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.