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Finding the Third Proportional to 79.88 and 174.38

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Solution

The third proportional to 79.88 and 174.38 is: 380.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.88 : 174.38 = 174.38 : x
  2. Step 2: Convert to fraction form
    79.88/174.38 = 174.38/x
  3. Step 3: Cross multiply
    79.88x = 174.38 × 174.38
  4. Step 4: Simplify right side
    79.88x = 30,406.64
  5. Step 5: Solve for x
    x = 30,406.64/79.88
  6. Step 6: Final answer
    x = 380.68

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.