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Finding the Third Proportional to 251 and 403.25

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Solution

The third proportional to 251 and 403.25 is: 647.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    251 : 403.25 = 403.25 : x
  2. Step 2: Convert to fraction form
    251/403.25 = 403.25/x
  3. Step 3: Cross multiply
    251x = 403.25 × 403.25
  4. Step 4: Simplify right side
    251x = 162,610.56
  5. Step 5: Solve for x
    x = 162,610.56/251
  6. Step 6: Final answer
    x = 647.85

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.