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Finding the Fourth Proportional to 664,654.20, 996,981.30 and 345,789.60

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Solution

The fourth proportional to 664,654.20, 996,981.30 and 345,789.60 is: 518,684.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,654.20 : 996,981.30 = 345,789.60 : x
  2. Step 2: Convert to fraction form
    664,654.20/996,981.30 = 345,789.60/x
  3. Step 3: Cross multiply
    664,654.20x = 996,981.30 × 345,789.60
  4. Step 4: Simplify right side
    664,654.20x = 344,745,764,934.48
  5. Step 5: Solve for x
    x = 344,745,764,934.48/664,654.20
  6. Step 6: Final answer
    x = 518,684.40

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Half scale
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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.