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Finding the Fourth Proportional to 2,167.98, 3,252.46 and 687.29

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Solution

The fourth proportional to 2,167.98, 3,252.46 and 687.29 is: 1,031.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,167.98 : 3,252.46 = 687.29 : x
  2. Step 2: Convert to fraction form
    2,167.98/3,252.46 = 687.29/x
  3. Step 3: Cross multiply
    2,167.98x = 3,252.46 × 687.29
  4. Step 4: Simplify right side
    2,167.98x = 2,235,383.23
  5. Step 5: Solve for x
    x = 2,235,383.23/2,167.98
  6. Step 6: Final answer
    x = 1,031.09

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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.