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Finding the Third Proportional to 206.50 and 388.25

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Solution

The third proportional to 206.50 and 388.25 is: 729.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.50 : 388.25 = 388.25 : x
  2. Step 2: Convert to fraction form
    206.50/388.25 = 388.25/x
  3. Step 3: Cross multiply
    206.50x = 388.25 × 388.25
  4. Step 4: Simplify right side
    206.50x = 150,738.06
  5. Step 5: Solve for x
    x = 150,738.06/206.50
  6. Step 6: Final answer
    x = 729.97

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Why These Related Problems?

These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.