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Finding the Third Proportional to 311 and 453.25

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Solution

The third proportional to 311 and 453.25 is: 660.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    311 : 453.25 = 453.25 : x
  2. Step 2: Convert to fraction form
    311/453.25 = 453.25/x
  3. Step 3: Cross multiply
    311x = 453.25 × 453.25
  4. Step 4: Simplify right side
    311x = 205,435.56
  5. Step 5: Solve for x
    x = 205,435.56/311
  6. Step 6: Final answer
    x = 660.56

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.