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Finding the Third Proportional to 25.13 and 41.91

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Solution

The third proportional to 25.13 and 41.91 is: 69.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.13 : 41.91 = 41.91 : x
  2. Step 2: Convert to fraction form
    25.13/41.91 = 41.91/x
  3. Step 3: Cross multiply
    25.13x = 41.91 × 41.91
  4. Step 4: Simplify right side
    25.13x = 1,756.13
  5. Step 5: Solve for x
    x = 1,756.13/25.13
  6. Step 6: Final answer
    x = 69.90

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.