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Finding the Third Proportional to 213.57 and 329.38

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Solution

The third proportional to 213.57 and 329.38 is: 507.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.57 : 329.38 = 329.38 : x
  2. Step 2: Convert to fraction form
    213.57/329.38 = 329.38/x
  3. Step 3: Cross multiply
    213.57x = 329.38 × 329.38
  4. Step 4: Simplify right side
    213.57x = 108,490.46
  5. Step 5: Solve for x
    x = 108,490.46/213.57
  6. Step 6: Final answer
    x = 507.98

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.