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Finding the Fourth Proportional to 392,389.50, 588,589.79 and 111,906.75

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Solution

The fourth proportional to 392,389.50, 588,589.79 and 111,906.75 is: 167,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,389.50 : 588,589.79 = 111,906.75 : x
  2. Step 2: Convert to fraction form
    392,389.50/588,589.79 = 111,906.75/x
  3. Step 3: Cross multiply
    392,389.50x = 588,589.79 × 111,906.75
  4. Step 4: Simplify right side
    392,389.50x = 65,867,169,922.55
  5. Step 5: Solve for x
    x = 65,867,169,922.55/392,389.50
  6. Step 6: Final answer
    x = 167,861.70

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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.