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Finding the Third Proportional to 216.25 and 335.75

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Solution

The third proportional to 216.25 and 335.75 is: 521.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.25 : 335.75 = 335.75 : x
  2. Step 2: Convert to fraction form
    216.25/335.75 = 335.75/x
  3. Step 3: Cross multiply
    216.25x = 335.75 × 335.75
  4. Step 4: Simplify right side
    216.25x = 112,728.06
  5. Step 5: Solve for x
    x = 112,728.06/216.25
  6. Step 6: Final answer
    x = 521.29

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.