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Finding the Third Proportional to 356.38 and 628.75

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Solution

The third proportional to 356.38 and 628.75 is: 1,109.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.38 : 628.75 = 628.75 : x
  2. Step 2: Convert to fraction form
    356.38/628.75 = 628.75/x
  3. Step 3: Cross multiply
    356.38x = 628.75 × 628.75
  4. Step 4: Simplify right side
    356.38x = 395,326.56
  5. Step 5: Solve for x
    x = 395,326.56/356.38
  6. Step 6: Final answer
    x = 1,109.30

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Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.