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Finding the Fourth Proportional to 391,145.52, 538,947.36 and 263,599.68

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Solution

The fourth proportional to 391,145.52, 538,947.36 and 263,599.68 is: 363,205.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,145.52 : 538,947.36 = 263,599.68 : x
  2. Step 2: Convert to fraction form
    391,145.52/538,947.36 = 263,599.68/x
  3. Step 3: Cross multiply
    391,145.52x = 538,947.36 × 263,599.68
  4. Step 4: Simplify right side
    391,145.52x = 142,066,351,632.85
  5. Step 5: Solve for x
    x = 142,066,351,632.85/391,145.52
  6. Step 6: Final answer
    x = 363,205.88

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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.