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Finding the Third Proportional to 3.30 and 7.76

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Solution

The third proportional to 3.30 and 7.76 is: 18.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.30 : 7.76 = 7.76 : x
  2. Step 2: Convert to fraction form
    3.30/7.76 = 7.76/x
  3. Step 3: Cross multiply
    3.30x = 7.76 × 7.76
  4. Step 4: Simplify right side
    3.30x = 60.20
  5. Step 5: Solve for x
    x = 60.20/3.30
  6. Step 6: Final answer
    x = 18.22

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.