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Finding the Third Proportional to 131.50 and 251

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Solution

The third proportional to 131.50 and 251 is: 479.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.50 : 251 = 251 : x
  2. Step 2: Convert to fraction form
    131.50/251 = 251/x
  3. Step 3: Cross multiply
    131.50x = 251 × 251
  4. Step 4: Simplify right side
    131.50x = 63,001
  5. Step 5: Solve for x
    x = 63,001/131.50
  6. Step 6: Final answer
    x = 479.10

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Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.