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Finding the Third Proportional to 331 and 474.75

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Solution

The third proportional to 331 and 474.75 is: 680.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    331 : 474.75 = 474.75 : x
  2. Step 2: Convert to fraction form
    331/474.75 = 474.75/x
  3. Step 3: Cross multiply
    331x = 474.75 × 474.75
  4. Step 4: Simplify right side
    331x = 225,387.56
  5. Step 5: Solve for x
    x = 225,387.56/331
  6. Step 6: Final answer
    x = 680.93

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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.