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Finding the Fourth Proportional to 2,511.88, 3,766.92 and 868

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Solution

The fourth proportional to 2,511.88, 3,766.92 and 868 is: 1,301.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,511.88 : 3,766.92 = 868 : x
  2. Step 2: Convert to fraction form
    2,511.88/3,766.92 = 868/x
  3. Step 3: Cross multiply
    2,511.88x = 3,766.92 × 868
  4. Step 4: Simplify right side
    2,511.88x = 3,269,686.56
  5. Step 5: Solve for x
    x = 3,269,686.56/2,511.88
  6. Step 6: Final answer
    x = 1,301.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.