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Finding the Fourth Proportional to 391,732.42, 540,391.80 and 255,845.92

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Solution

The fourth proportional to 391,732.42, 540,391.80 and 255,845.92 is: 352,937.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,732.42 : 540,391.80 = 255,845.92 : x
  2. Step 2: Convert to fraction form
    391,732.42/540,391.80 = 255,845.92/x
  3. Step 3: Cross multiply
    391,732.42x = 540,391.80 × 255,845.92
  4. Step 4: Simplify right side
    391,732.42x = 138,257,037,231.46
  5. Step 5: Solve for x
    x = 138,257,037,231.46/391,732.42
  6. Step 6: Final answer
    x = 352,937.44

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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.