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Finding the Third Proportional to 3.27 and 7.82

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Solution

The third proportional to 3.27 and 7.82 is: 18.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.27 : 7.82 = 7.82 : x
  2. Step 2: Convert to fraction form
    3.27/7.82 = 7.82/x
  3. Step 3: Cross multiply
    3.27x = 7.82 × 7.82
  4. Step 4: Simplify right side
    3.27x = 61.16
  5. Step 5: Solve for x
    x = 61.16/3.27
  6. Step 6: Final answer
    x = 18.72

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Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.