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Finding the Fourth Proportional to 485,593.20, 728,389.80 and 317,631.60

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Solution

The fourth proportional to 485,593.20, 728,389.80 and 317,631.60 is: 476,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,593.20 : 728,389.80 = 317,631.60 : x
  2. Step 2: Convert to fraction form
    485,593.20/728,389.80 = 317,631.60/x
  3. Step 3: Cross multiply
    485,593.20x = 728,389.80 × 317,631.60
  4. Step 4: Simplify right side
    485,593.20x = 231,359,617,597.68
  5. Step 5: Solve for x
    x = 231,359,617,597.68/485,593.20
  6. Step 6: Final answer
    x = 476,447.40

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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.