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Finding the Fourth Proportional to 379,279.12, 568,728.20 and 126,470.12

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Solution

The fourth proportional to 379,279.12, 568,728.20 and 126,470.12 is: 189,641.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,279.12 : 568,728.20 = 126,470.12 : x
  2. Step 2: Convert to fraction form
    379,279.12/568,728.20 = 126,470.12/x
  3. Step 3: Cross multiply
    379,279.12x = 568,728.20 × 126,470.12
  4. Step 4: Simplify right side
    379,279.12x = 71,927,123,701.38
  5. Step 5: Solve for x
    x = 71,927,123,701.38/379,279.12
  6. Step 6: Final answer
    x = 189,641.66

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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.