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Finding the Fourth Proportional to 391,833.65, 540,789.55 and 238,960.53

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Solution

The fourth proportional to 391,833.65, 540,789.55 and 238,960.53 is: 329,801.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,833.65 : 540,789.55 = 238,960.53 : x
  2. Step 2: Convert to fraction form
    391,833.65/540,789.55 = 238,960.53/x
  3. Step 3: Cross multiply
    391,833.65x = 540,789.55 × 238,960.53
  4. Step 4: Simplify right side
    391,833.65x = 129,227,357,486.46
  5. Step 5: Solve for x
    x = 129,227,357,486.46/391,833.65
  6. Step 6: Final answer
    x = 329,801.58

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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.