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Finding the Third Proportional to 211 and 248.75

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Solution

The third proportional to 211 and 248.75 is: 293.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    211 : 248.75 = 248.75 : x
  2. Step 2: Convert to fraction form
    211/248.75 = 248.75/x
  3. Step 3: Cross multiply
    211x = 248.75 × 248.75
  4. Step 4: Simplify right side
    211x = 61,876.56
  5. Step 5: Solve for x
    x = 61,876.56/211
  6. Step 6: Final answer
    x = 293.25

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.