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Finding the Third Proportional to 328 and 474.25

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Solution

The third proportional to 328 and 474.25 is: 685.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    328 : 474.25 = 474.25 : x
  2. Step 2: Convert to fraction form
    328/474.25 = 474.25/x
  3. Step 3: Cross multiply
    328x = 474.25 × 474.25
  4. Step 4: Simplify right side
    328x = 224,913.06
  5. Step 5: Solve for x
    x = 224,913.06/328
  6. Step 6: Final answer
    x = 685.71

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.