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Finding the Third Proportional to 201.56 and 276.28

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Solution

The third proportional to 201.56 and 276.28 is: 378.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.56 : 276.28 = 276.28 : x
  2. Step 2: Convert to fraction form
    201.56/276.28 = 276.28/x
  3. Step 3: Cross multiply
    201.56x = 276.28 × 276.28
  4. Step 4: Simplify right side
    201.56x = 76,331.33
  5. Step 5: Solve for x
    x = 76,331.33/201.56
  6. Step 6: Final answer
    x = 378.70

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.