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Finding the Third Proportional to 338.75 and 368

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Solution

The third proportional to 338.75 and 368 is: 399.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.75 : 368 = 368 : x
  2. Step 2: Convert to fraction form
    338.75/368 = 368/x
  3. Step 3: Cross multiply
    338.75x = 368 × 368
  4. Step 4: Simplify right side
    338.75x = 135,424
  5. Step 5: Solve for x
    x = 135,424/338.75
  6. Step 6: Final answer
    x = 399.78

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.