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Finding the Third Proportional to 247 and 354.25

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Solution

The third proportional to 247 and 354.25 is: 508.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    247 : 354.25 = 354.25 : x
  2. Step 2: Convert to fraction form
    247/354.25 = 354.25/x
  3. Step 3: Cross multiply
    247x = 354.25 × 354.25
  4. Step 4: Simplify right side
    247x = 125,493.06
  5. Step 5: Solve for x
    x = 125,493.06/247
  6. Step 6: Final answer
    x = 508.07

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.