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Finding the Fourth Proportional to 391,836.15, 540,793 and 238,963.03

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Solution

The fourth proportional to 391,836.15, 540,793 and 238,963.03 is: 329,805.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,836.15 : 540,793 = 238,963.03 : x
  2. Step 2: Convert to fraction form
    391,836.15/540,793 = 238,963.03/x
  3. Step 3: Cross multiply
    391,836.15x = 540,793 × 238,963.03
  4. Step 4: Simplify right side
    391,836.15x = 129,229,533,882.79
  5. Step 5: Solve for x
    x = 129,229,533,882.79/391,836.15
  6. Step 6: Final answer
    x = 329,805.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.