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Finding the Third Proportional to 3.80 and 10.76

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Solution

The third proportional to 3.80 and 10.76 is: 30.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.80 : 10.76 = 10.76 : x
  2. Step 2: Convert to fraction form
    3.80/10.76 = 10.76/x
  3. Step 3: Cross multiply
    3.80x = 10.76 × 10.76
  4. Step 4: Simplify right side
    3.80x = 115.73
  5. Step 5: Solve for x
    x = 115.73/3.80
  6. Step 6: Final answer
    x = 30.48

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Why These Related Problems?

These problems maintain the same ratio (2.83) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.