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Finding the Third Proportional to 251 and 387.88

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Solution

The third proportional to 251 and 387.88 is: 599.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    251 : 387.88 = 387.88 : x
  2. Step 2: Convert to fraction form
    251/387.88 = 387.88/x
  3. Step 3: Cross multiply
    251x = 387.88 × 387.88
  4. Step 4: Simplify right side
    251x = 150,447.02
  5. Step 5: Solve for x
    x = 150,447.02/251
  6. Step 6: Final answer
    x = 599.39

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.