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Finding the Fourth Proportional to 664,393.20, 996,589.80 and 487,246.20

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Solution

The fourth proportional to 664,393.20, 996,589.80 and 487,246.20 is: 730,869.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,393.20 : 996,589.80 = 487,246.20 : x
  2. Step 2: Convert to fraction form
    664,393.20/996,589.80 = 487,246.20/x
  3. Step 3: Cross multiply
    664,393.20x = 996,589.80 × 487,246.20
  4. Step 4: Simplify right side
    664,393.20x = 485,584,593,008.76
  5. Step 5: Solve for x
    x = 485,584,593,008.76/664,393.20
  6. Step 6: Final answer
    x = 730,869.30

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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.