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Finding the Third Proportional to 3.88 and 5.47

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Solution

The third proportional to 3.88 and 5.47 is: 7.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.88 : 5.47 = 5.47 : x
  2. Step 2: Convert to fraction form
    3.88/5.47 = 5.47/x
  3. Step 3: Cross multiply
    3.88x = 5.47 × 5.47
  4. Step 4: Simplify right side
    3.88x = 29.91
  5. Step 5: Solve for x
    x = 29.91/3.88
  6. Step 6: Final answer
    x = 7.72

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.