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Finding the Fourth Proportional to 3,959.72, 5,463.78 and 2,387.88

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Solution

The fourth proportional to 3,959.72, 5,463.78 and 2,387.88 is: 3,294.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.72 : 5,463.78 = 2,387.88 : x
  2. Step 2: Convert to fraction form
    3,959.72/5,463.78 = 2,387.88/x
  3. Step 3: Cross multiply
    3,959.72x = 5,463.78 × 2,387.88
  4. Step 4: Simplify right side
    3,959.72x = 13,046,850.99
  5. Step 5: Solve for x
    x = 13,046,850.99/3,959.72
  6. Step 6: Final answer
    x = 3,294.89

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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.