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Finding the Third Proportional to 149.50 and 251.75

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Solution

The third proportional to 149.50 and 251.75 is: 423.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.50 : 251.75 = 251.75 : x
  2. Step 2: Convert to fraction form
    149.50/251.75 = 251.75/x
  3. Step 3: Cross multiply
    149.50x = 251.75 × 251.75
  4. Step 4: Simplify right side
    149.50x = 63,378.06
  5. Step 5: Solve for x
    x = 63,378.06/149.50
  6. Step 6: Final answer
    x = 423.93

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Why These Related Problems?

These problems maintain the same ratio (1.68) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.