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Finding the Fourth Proportional to 391,481.11, 540,234.74 and 230,346.59

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Solution

The fourth proportional to 391,481.11, 540,234.74 and 230,346.59 is: 317,872.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,481.11 : 540,234.74 = 230,346.59 : x
  2. Step 2: Convert to fraction form
    391,481.11/540,234.74 = 230,346.59/x
  3. Step 3: Cross multiply
    391,481.11x = 540,234.74 × 230,346.59
  4. Step 4: Simplify right side
    391,481.11x = 124,441,232,084.99
  5. Step 5: Solve for x
    x = 124,441,232,084.99/391,481.11
  6. Step 6: Final answer
    x = 317,872.89

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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.