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Finding the Fourth Proportional to 278,508.88, 382,864.40 and 239,604.58

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Solution

The fourth proportional to 278,508.88, 382,864.40 and 239,604.58 is: 329,382.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,508.88 : 382,864.40 = 239,604.58 : x
  2. Step 2: Convert to fraction form
    278,508.88/382,864.40 = 239,604.58/x
  3. Step 3: Cross multiply
    278,508.88x = 382,864.40 × 239,604.58
  4. Step 4: Simplify right side
    278,508.88x = 91,736,063,758.95
  5. Step 5: Solve for x
    x = 91,736,063,758.95/278,508.88
  6. Step 6: Final answer
    x = 329,382.90

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.