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Finding the Third Proportional to 111.75 and 214

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Solution

The third proportional to 111.75 and 214 is: 409.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.75 : 214 = 214 : x
  2. Step 2: Convert to fraction form
    111.75/214 = 214/x
  3. Step 3: Cross multiply
    111.75x = 214 × 214
  4. Step 4: Simplify right side
    111.75x = 45,796
  5. Step 5: Solve for x
    x = 45,796/111.75
  6. Step 6: Final answer
    x = 409.81

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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.