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Finding the Fourth Proportional to 391,386.18, 540,103.80 and 230,251.61

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Solution

The fourth proportional to 391,386.18, 540,103.80 and 230,251.61 is: 317,741.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,386.18 : 540,103.80 = 230,251.61 : x
  2. Step 2: Convert to fraction form
    391,386.18/540,103.80 = 230,251.61/x
  3. Step 3: Cross multiply
    391,386.18x = 540,103.80 × 230,251.61
  4. Step 4: Simplify right side
    391,386.18x = 124,359,769,517.12
  5. Step 5: Solve for x
    x = 124,359,769,517.12/391,386.18
  6. Step 6: Final answer
    x = 317,741.85

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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.