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Finding the Third Proportional to 274 and 412.75

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Solution

The third proportional to 274 and 412.75 is: 621.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    274 : 412.75 = 412.75 : x
  2. Step 2: Convert to fraction form
    274/412.75 = 412.75/x
  3. Step 3: Cross multiply
    274x = 412.75 × 412.75
  4. Step 4: Simplify right side
    274x = 170,362.56
  5. Step 5: Solve for x
    x = 170,362.56/274
  6. Step 6: Final answer
    x = 621.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.