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Finding the Third Proportional to 179.72 and 218.95

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Solution

The third proportional to 179.72 and 218.95 is: 266.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.72 : 218.95 = 218.95 : x
  2. Step 2: Convert to fraction form
    179.72/218.95 = 218.95/x
  3. Step 3: Cross multiply
    179.72x = 218.95 × 218.95
  4. Step 4: Simplify right side
    179.72x = 47,940.47
  5. Step 5: Solve for x
    x = 47,940.47/179.72
  6. Step 6: Final answer
    x = 266.75

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.