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Finding the Fourth Proportional to 2,866.52, 3,956.10 and 1,687.57

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Solution

The fourth proportional to 2,866.52, 3,956.10 and 1,687.57 is: 2,329.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,866.52 : 3,956.10 = 1,687.57 : x
  2. Step 2: Convert to fraction form
    2,866.52/3,956.10 = 1,687.57/x
  3. Step 3: Cross multiply
    2,866.52x = 3,956.10 × 1,687.57
  4. Step 4: Simplify right side
    2,866.52x = 6,676,195.68
  5. Step 5: Solve for x
    x = 6,676,195.68/2,866.52
  6. Step 6: Final answer
    x = 2,329.02

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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.