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Finding the Third Proportional to 351.25 and 742.75

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Solution

The third proportional to 351.25 and 742.75 is: 1,570.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.25 : 742.75 = 742.75 : x
  2. Step 2: Convert to fraction form
    351.25/742.75 = 742.75/x
  3. Step 3: Cross multiply
    351.25x = 742.75 × 742.75
  4. Step 4: Simplify right side
    351.25x = 551,677.56
  5. Step 5: Solve for x
    x = 551,677.56/351.25
  6. Step 6: Final answer
    x = 1,570.61

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.