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Finding the Fourth Proportional to 391,605.90, 587,408.85 and 96,117.90

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Solution

The fourth proportional to 391,605.90, 587,408.85 and 96,117.90 is: 144,176.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,605.90 : 587,408.85 = 96,117.90 : x
  2. Step 2: Convert to fraction form
    391,605.90/587,408.85 = 96,117.90/x
  3. Step 3: Cross multiply
    391,605.90x = 587,408.85 × 96,117.90
  4. Step 4: Simplify right side
    391,605.90x = 56,460,505,103.42
  5. Step 5: Solve for x
    x = 56,460,505,103.42/391,605.90
  6. Step 6: Final answer
    x = 144,176.85

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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.