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Finding the Third Proportional to 232.50 and 315.50

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Solution

The third proportional to 232.50 and 315.50 is: 428.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.50 : 315.50 = 315.50 : x
  2. Step 2: Convert to fraction form
    232.50/315.50 = 315.50/x
  3. Step 3: Cross multiply
    232.50x = 315.50 × 315.50
  4. Step 4: Simplify right side
    232.50x = 99,540.25
  5. Step 5: Solve for x
    x = 99,540.25/232.50
  6. Step 6: Final answer
    x = 428.13

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.