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Finding the Third Proportional to 3.81 and 5.19

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Solution

The third proportional to 3.81 and 5.19 is: 7.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.81 : 5.19 = 5.19 : x
  2. Step 2: Convert to fraction form
    3.81/5.19 = 5.19/x
  3. Step 3: Cross multiply
    3.81x = 5.19 × 5.19
  4. Step 4: Simplify right side
    3.81x = 26.91
  5. Step 5: Solve for x
    x = 26.91/3.81
  6. Step 6: Final answer
    x = 7.06

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.