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Finding the Third Proportional to 3.91 and 6.23

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Solution

The third proportional to 3.91 and 6.23 is: 9.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.91 : 6.23 = 6.23 : x
  2. Step 2: Convert to fraction form
    3.91/6.23 = 6.23/x
  3. Step 3: Cross multiply
    3.91x = 6.23 × 6.23
  4. Step 4: Simplify right side
    3.91x = 38.87
  5. Step 5: Solve for x
    x = 38.87/3.91
  6. Step 6: Final answer
    x = 9.93

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.