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Finding the Fourth Proportional to 391,379.32, 587,236.11 and 166,845.50

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Solution

The fourth proportional to 391,379.32, 587,236.11 and 166,845.50 is: 250,339.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,379.32 : 587,236.11 = 166,845.50 : x
  2. Step 2: Convert to fraction form
    391,379.32/587,236.11 = 166,845.50/x
  3. Step 3: Cross multiply
    391,379.32x = 587,236.11 × 166,845.50
  4. Step 4: Simplify right side
    391,379.32x = 97,977,702,391.01
  5. Step 5: Solve for x
    x = 97,977,702,391.01/391,379.32
  6. Step 6: Final answer
    x = 250,339.50

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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.