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Finding the Fourth Proportional to 391,581.60, 587,372.40 and 267,165.60

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Solution

The fourth proportional to 391,581.60, 587,372.40 and 267,165.60 is: 400,748.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,581.60 : 587,372.40 = 267,165.60 : x
  2. Step 2: Convert to fraction form
    391,581.60/587,372.40 = 267,165.60/x
  3. Step 3: Cross multiply
    391,581.60x = 587,372.40 × 267,165.60
  4. Step 4: Simplify right side
    391,581.60x = 156,925,699,669.44
  5. Step 5: Solve for x
    x = 156,925,699,669.44/391,581.60
  6. Step 6: Final answer
    x = 400,748.40

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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.