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Finding the Fourth Proportional to 664,266.30, 996,399.45 and 398,327.10

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Solution

The fourth proportional to 664,266.30, 996,399.45 and 398,327.10 is: 597,490.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,266.30 : 996,399.45 = 398,327.10 : x
  2. Step 2: Convert to fraction form
    664,266.30/996,399.45 = 398,327.10/x
  3. Step 3: Cross multiply
    664,266.30x = 996,399.45 × 398,327.10
  4. Step 4: Simplify right side
    664,266.30x = 396,892,903,360.10
  5. Step 5: Solve for x
    x = 396,892,903,360.10/664,266.30
  6. Step 6: Final answer
    x = 597,490.65

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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.