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Finding the Third Proportional to 3.93 and 5.55

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Solution

The third proportional to 3.93 and 5.55 is: 7.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.93 : 5.55 = 5.55 : x
  2. Step 2: Convert to fraction form
    3.93/5.55 = 5.55/x
  3. Step 3: Cross multiply
    3.93x = 5.55 × 5.55
  4. Step 4: Simplify right side
    3.93x = 30.85
  5. Step 5: Solve for x
    x = 30.85/3.93
  6. Step 6: Final answer
    x = 7.84

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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.