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Finding the Third Proportional to 4.08 and 8.79

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Solution

The third proportional to 4.08 and 8.79 is: 18.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.08 : 8.79 = 8.79 : x
  2. Step 2: Convert to fraction form
    4.08/8.79 = 8.79/x
  3. Step 3: Cross multiply
    4.08x = 8.79 × 8.79
  4. Step 4: Simplify right side
    4.08x = 77.25
  5. Step 5: Solve for x
    x = 77.25/4.08
  6. Step 6: Final answer
    x = 18.94

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.