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Finding the Third Proportional to 201.50 and 286.75

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Solution

The third proportional to 201.50 and 286.75 is: 408.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.50 : 286.75 = 286.75 : x
  2. Step 2: Convert to fraction form
    201.50/286.75 = 286.75/x
  3. Step 3: Cross multiply
    201.50x = 286.75 × 286.75
  4. Step 4: Simplify right side
    201.50x = 82,225.56
  5. Step 5: Solve for x
    x = 82,225.56/201.50
  6. Step 6: Final answer
    x = 408.07

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.