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Finding the Third Proportional to 1.68 and 3.11

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Solution

The third proportional to 1.68 and 3.11 is: 5.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.68 : 3.11 = 3.11 : x
  2. Step 2: Convert to fraction form
    1.68/3.11 = 3.11/x
  3. Step 3: Cross multiply
    1.68x = 3.11 × 3.11
  4. Step 4: Simplify right side
    1.68x = 9.70
  5. Step 5: Solve for x
    x = 9.70/1.68
  6. Step 6: Final answer
    x = 5.76

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Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.