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Finding the Third Proportional to 3.97 and 8.66

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Solution

The third proportional to 3.97 and 8.66 is: 18.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.97 : 8.66 = 8.66 : x
  2. Step 2: Convert to fraction form
    3.97/8.66 = 8.66/x
  3. Step 3: Cross multiply
    3.97x = 8.66 × 8.66
  4. Step 4: Simplify right side
    3.97x = 74.97
  5. Step 5: Solve for x
    x = 74.97/3.97
  6. Step 6: Final answer
    x = 18.89

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.