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Finding the Third Proportional to 211.25 and 375

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Solution

The third proportional to 211.25 and 375 is: 665.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.25 : 375 = 375 : x
  2. Step 2: Convert to fraction form
    211.25/375 = 375/x
  3. Step 3: Cross multiply
    211.25x = 375 × 375
  4. Step 4: Simplify right side
    211.25x = 140,625
  5. Step 5: Solve for x
    x = 140,625/211.25
  6. Step 6: Final answer
    x = 665.68

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.