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Finding the Third Proportional to 251.06 and 417.56

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Solution

The third proportional to 251.06 and 417.56 is: 694.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.06 : 417.56 = 417.56 : x
  2. Step 2: Convert to fraction form
    251.06/417.56 = 417.56/x
  3. Step 3: Cross multiply
    251.06x = 417.56 × 417.56
  4. Step 4: Simplify right side
    251.06x = 174,358.44
  5. Step 5: Solve for x
    x = 174,358.44/251.06
  6. Step 6: Final answer
    x = 694.48

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Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.