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Finding the Fourth Proportional to 2,167.29, 3,250.49 and 761.90

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Solution

The fourth proportional to 2,167.29, 3,250.49 and 761.90 is: 1,142.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,167.29 : 3,250.49 = 761.90 : x
  2. Step 2: Convert to fraction form
    2,167.29/3,250.49 = 761.90/x
  3. Step 3: Cross multiply
    2,167.29x = 3,250.49 × 761.90
  4. Step 4: Simplify right side
    2,167.29x = 2,476,528.27
  5. Step 5: Solve for x
    x = 2,476,528.27/2,167.29
  6. Step 6: Final answer
    x = 1,142.68

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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.