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Finding the Third Proportional to 381.50 and 902.75

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Solution

The third proportional to 381.50 and 902.75 is: 2,136.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.50 : 902.75 = 902.75 : x
  2. Step 2: Convert to fraction form
    381.50/902.75 = 902.75/x
  3. Step 3: Cross multiply
    381.50x = 902.75 × 902.75
  4. Step 4: Simplify right side
    381.50x = 814,957.56
  5. Step 5: Solve for x
    x = 814,957.56/381.50
  6. Step 6: Final answer
    x = 2,136.19

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Why These Related Problems?

These problems maintain the same ratio (2.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.