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Finding the Third Proportional to 251.74 and 385.13

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Solution

The third proportional to 251.74 and 385.13 is: 589.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.74 : 385.13 = 385.13 : x
  2. Step 2: Convert to fraction form
    251.74/385.13 = 385.13/x
  3. Step 3: Cross multiply
    251.74x = 385.13 × 385.13
  4. Step 4: Simplify right side
    251.74x = 148,321.27
  5. Step 5: Solve for x
    x = 148,321.27/251.74
  6. Step 6: Final answer
    x = 589.18

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.