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Finding the Third Proportional to 239 and 424.75

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Solution

The third proportional to 239 and 424.75 is: 754.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    239 : 424.75 = 424.75 : x
  2. Step 2: Convert to fraction form
    239/424.75 = 424.75/x
  3. Step 3: Cross multiply
    239x = 424.75 × 424.75
  4. Step 4: Simplify right side
    239x = 180,412.56
  5. Step 5: Solve for x
    x = 180,412.56/239
  6. Step 6: Final answer
    x = 754.86

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.