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Finding the Fourth Proportional to 499,387.20, 749,080.80 and 219,451.20

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Solution

The fourth proportional to 499,387.20, 749,080.80 and 219,451.20 is: 329,176.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,387.20 : 749,080.80 = 219,451.20 : x
  2. Step 2: Convert to fraction form
    499,387.20/749,080.80 = 219,451.20/x
  3. Step 3: Cross multiply
    499,387.20x = 749,080.80 × 219,451.20
  4. Step 4: Simplify right side
    499,387.20x = 164,386,680,456.96
  5. Step 5: Solve for x
    x = 164,386,680,456.96/499,387.20
  6. Step 6: Final answer
    x = 329,176.80

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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.