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Finding the Third Proportional to 3.21 and 7.14

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Solution

The third proportional to 3.21 and 7.14 is: 15.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.21 : 7.14 = 7.14 : x
  2. Step 2: Convert to fraction form
    3.21/7.14 = 7.14/x
  3. Step 3: Cross multiply
    3.21x = 7.14 × 7.14
  4. Step 4: Simplify right side
    3.21x = 50.92
  5. Step 5: Solve for x
    x = 50.92/3.21
  6. Step 6: Final answer
    x = 15.88

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.