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Finding the Third Proportional to 5.20 and 8.67

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Solution

The third proportional to 5.20 and 8.67 is: 14.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.20 : 8.67 = 8.67 : x
  2. Step 2: Convert to fraction form
    5.20/8.67 = 8.67/x
  3. Step 3: Cross multiply
    5.20x = 8.67 × 8.67
  4. Step 4: Simplify right side
    5.20x = 75.20
  5. Step 5: Solve for x
    x = 75.20/5.20
  6. Step 6: Final answer
    x = 14.45

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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.