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Finding the Fourth Proportional to 664,309.20, 996,463.80 and 487,162.20

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Solution

The fourth proportional to 664,309.20, 996,463.80 and 487,162.20 is: 730,743.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,309.20 : 996,463.80 = 487,162.20 : x
  2. Step 2: Convert to fraction form
    664,309.20/996,463.80 = 487,162.20/x
  3. Step 3: Cross multiply
    664,309.20x = 996,463.80 × 487,162.20
  4. Step 4: Simplify right side
    664,309.20x = 485,439,497,028.36
  5. Step 5: Solve for x
    x = 485,439,497,028.36/664,309.20
  6. Step 6: Final answer
    x = 730,743.30

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Double scale
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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.