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Finding the Third Proportional to 111.25 and 219

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Solution

The third proportional to 111.25 and 219 is: 431.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.25 : 219 = 219 : x
  2. Step 2: Convert to fraction form
    111.25/219 = 219/x
  3. Step 3: Cross multiply
    111.25x = 219 × 219
  4. Step 4: Simplify right side
    111.25x = 47,961
  5. Step 5: Solve for x
    x = 47,961/111.25
  6. Step 6: Final answer
    x = 431.11

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.