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Finding the Third Proportional to 75.25 and 169.25

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Solution

The third proportional to 75.25 and 169.25 is: 380.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.25 : 169.25 = 169.25 : x
  2. Step 2: Convert to fraction form
    75.25/169.25 = 169.25/x
  3. Step 3: Cross multiply
    75.25x = 169.25 × 169.25
  4. Step 4: Simplify right side
    75.25x = 28,645.56
  5. Step 5: Solve for x
    x = 28,645.56/75.25
  6. Step 6: Final answer
    x = 380.67

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Why These Related Problems?

These problems maintain the same ratio (2.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.