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Finding the Third Proportional to 3.14 and 6.90

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Solution

The third proportional to 3.14 and 6.90 is: 15.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.14 : 6.90 = 6.90 : x
  2. Step 2: Convert to fraction form
    3.14/6.90 = 6.90/x
  3. Step 3: Cross multiply
    3.14x = 6.90 × 6.90
  4. Step 4: Simplify right side
    3.14x = 47.60
  5. Step 5: Solve for x
    x = 47.60/3.14
  6. Step 6: Final answer
    x = 15.18

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.