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Finding the Fourth Proportional to 485,818.60, 728,411.10 and 436,052.20

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Solution

The fourth proportional to 485,818.60, 728,411.10 and 436,052.20 is: 653,793.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,818.60 : 728,411.10 = 436,052.20 : x
  2. Step 2: Convert to fraction form
    485,818.60/728,411.10 = 436,052.20/x
  3. Step 3: Cross multiply
    485,818.60x = 728,411.10 × 436,052.20
  4. Step 4: Simplify right side
    485,818.60x = 317,625,262,659.42
  5. Step 5: Solve for x
    x = 317,625,262,659.42/485,818.60
  6. Step 6: Final answer
    x = 653,793.95

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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.