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Finding the Third Proportional to 249 and 336.75

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Solution

The third proportional to 249 and 336.75 is: 455.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    249 : 336.75 = 336.75 : x
  2. Step 2: Convert to fraction form
    249/336.75 = 336.75/x
  3. Step 3: Cross multiply
    249x = 336.75 × 336.75
  4. Step 4: Simplify right side
    249x = 113,400.56
  5. Step 5: Solve for x
    x = 113,400.56/249
  6. Step 6: Final answer
    x = 455.42

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.