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Finding the Third Proportional to 861.38 and 1,889.25

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Solution

The third proportional to 861.38 and 1,889.25 is: 4,143.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    861.38 : 1,889.25 = 1,889.25 : x
  2. Step 2: Convert to fraction form
    861.38/1,889.25 = 1,889.25/x
  3. Step 3: Cross multiply
    861.38x = 1,889.25 × 1,889.25
  4. Step 4: Simplify right side
    861.38x = 3,569,265.56
  5. Step 5: Solve for x
    x = 3,569,265.56/861.38
  6. Step 6: Final answer
    x = 4,143.68

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.