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Finding the Third Proportional to 3.65 and 8.79

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Solution

The third proportional to 3.65 and 8.79 is: 21.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.65 : 8.79 = 8.79 : x
  2. Step 2: Convert to fraction form
    3.65/8.79 = 8.79/x
  3. Step 3: Cross multiply
    3.65x = 8.79 × 8.79
  4. Step 4: Simplify right side
    3.65x = 77.22
  5. Step 5: Solve for x
    x = 77.22/3.65
  6. Step 6: Final answer
    x = 21.18

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Why These Related Problems?

These problems maintain the same ratio (2.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.