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Finding the Fourth Proportional to 391,454.60, 587,181.90 and 204,523.40

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Solution

The fourth proportional to 391,454.60, 587,181.90 and 204,523.40 is: 306,785.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,454.60 : 587,181.90 = 204,523.40 : x
  2. Step 2: Convert to fraction form
    391,454.60/587,181.90 = 204,523.40/x
  3. Step 3: Cross multiply
    391,454.60x = 587,181.90 × 204,523.40
  4. Step 4: Simplify right side
    391,454.60x = 120,092,438,606.46
  5. Step 5: Solve for x
    x = 120,092,438,606.46/391,454.60
  6. Step 6: Final answer
    x = 306,785.10

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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.