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Finding the Fourth Proportional to 485,590.20, 728,385.30 and 317,628.60

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Solution

The fourth proportional to 485,590.20, 728,385.30 and 317,628.60 is: 476,442.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,590.20 : 728,385.30 = 317,628.60 : x
  2. Step 2: Convert to fraction form
    485,590.20/728,385.30 = 317,628.60/x
  3. Step 3: Cross multiply
    485,590.20x = 728,385.30 × 317,628.60
  4. Step 4: Simplify right side
    485,590.20x = 231,356,003,099.58
  5. Step 5: Solve for x
    x = 231,356,003,099.58/485,590.20
  6. Step 6: Final answer
    x = 476,442.90

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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.