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Finding the Third Proportional to 220 and 343.25

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Solution

The third proportional to 220 and 343.25 is: 535.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    220 : 343.25 = 343.25 : x
  2. Step 2: Convert to fraction form
    220/343.25 = 343.25/x
  3. Step 3: Cross multiply
    220x = 343.25 × 343.25
  4. Step 4: Simplify right side
    220x = 117,820.56
  5. Step 5: Solve for x
    x = 117,820.56/220
  6. Step 6: Final answer
    x = 535.55

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.