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Finding the Fourth Proportional to 486,046.80, 728,195.40 and 396,817.20

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Solution

The fourth proportional to 486,046.80, 728,195.40 and 396,817.20 is: 594,511.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,046.80 : 728,195.40 = 396,817.20 : x
  2. Step 2: Convert to fraction form
    486,046.80/728,195.40 = 396,817.20/x
  3. Step 3: Cross multiply
    486,046.80x = 728,195.40 × 396,817.20
  4. Step 4: Simplify right side
    486,046.80x = 288,960,459,680.88
  5. Step 5: Solve for x
    x = 288,960,459,680.88/486,046.80
  6. Step 6: Final answer
    x = 594,511.60

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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.