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Finding the Third Proportional to 351.38 and 672.38

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Solution

The third proportional to 351.38 and 672.38 is: 1,286.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.38 : 672.38 = 672.38 : x
  2. Step 2: Convert to fraction form
    351.38/672.38 = 672.38/x
  3. Step 3: Cross multiply
    351.38x = 672.38 × 672.38
  4. Step 4: Simplify right side
    351.38x = 452,088.14
  5. Step 5: Solve for x
    x = 452,088.14/351.38
  6. Step 6: Final answer
    x = 1,286.63

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Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.