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Finding the Third Proportional to 6.60 and 7.38

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Solution

The third proportional to 6.60 and 7.38 is: 8.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.60 : 7.38 = 7.38 : x
  2. Step 2: Convert to fraction form
    6.60/7.38 = 7.38/x
  3. Step 3: Cross multiply
    6.60x = 7.38 × 7.38
  4. Step 4: Simplify right side
    6.60x = 54.42
  5. Step 5: Solve for x
    x = 54.42/6.60
  6. Step 6: Final answer
    x = 8.25

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Why These Related Problems?

These problems maintain the same ratio (1.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.