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Finding the Third Proportional to 2.72 and 3.11

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Solution

The third proportional to 2.72 and 3.11 is: 3.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.72 : 3.11 = 3.11 : x
  2. Step 2: Convert to fraction form
    2.72/3.11 = 3.11/x
  3. Step 3: Cross multiply
    2.72x = 3.11 × 3.11
  4. Step 4: Simplify right side
    2.72x = 9.64
  5. Step 5: Solve for x
    x = 9.64/2.72
  6. Step 6: Final answer
    x = 3.55

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.