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Finding the Fourth Proportional to 664,425.20, 996,637.80 and 487,278.20

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Solution

The fourth proportional to 664,425.20, 996,637.80 and 487,278.20 is: 730,917.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,425.20 : 996,637.80 = 487,278.20 : x
  2. Step 2: Convert to fraction form
    664,425.20/996,637.80 = 487,278.20/x
  3. Step 3: Cross multiply
    664,425.20x = 996,637.80 × 487,278.20
  4. Step 4: Simplify right side
    664,425.20x = 485,639,873,235.96
  5. Step 5: Solve for x
    x = 485,639,873,235.96/664,425.20
  6. Step 6: Final answer
    x = 730,917.30

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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.