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Finding the Third Proportional to 871.38 and 1,864.27

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Solution

The third proportional to 871.38 and 1,864.27 is: 3,988.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.38 : 1,864.27 = 1,864.27 : x
  2. Step 2: Convert to fraction form
    871.38/1,864.27 = 1,864.27/x
  3. Step 3: Cross multiply
    871.38x = 1,864.27 × 1,864.27
  4. Step 4: Simplify right side
    871.38x = 3,475,486.32
  5. Step 5: Solve for x
    x = 3,475,486.32/871.38
  6. Step 6: Final answer
    x = 3,988.47

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.