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Finding the Fourth Proportional to 486.75, 671.61 and 329.41

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Solution

The fourth proportional to 486.75, 671.61 and 329.41 is: 454.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.75 : 671.61 = 329.41 : x
  2. Step 2: Convert to fraction form
    486.75/671.61 = 329.41/x
  3. Step 3: Cross multiply
    486.75x = 671.61 × 329.41
  4. Step 4: Simplify right side
    486.75x = 221,234.61
  5. Step 5: Solve for x
    x = 221,234.61/486.75
  6. Step 6: Final answer
    x = 454.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.