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Finding the Third Proportional to 3.81 and 6.50

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Solution

The third proportional to 3.81 and 6.50 is: 11.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.81 : 6.50 = 6.50 : x
  2. Step 2: Convert to fraction form
    3.81/6.50 = 6.50/x
  3. Step 3: Cross multiply
    3.81x = 6.50 × 6.50
  4. Step 4: Simplify right side
    3.81x = 42.22
  5. Step 5: Solve for x
    x = 42.22/3.81
  6. Step 6: Final answer
    x = 11.09

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Why These Related Problems?

These problems maintain the same ratio (1.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.