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Finding the Fourth Proportional to 329.82, 494.56 and 121.57

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Solution

The fourth proportional to 329.82, 494.56 and 121.57 is: 182.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.82 : 494.56 = 121.57 : x
  2. Step 2: Convert to fraction form
    329.82/494.56 = 121.57/x
  3. Step 3: Cross multiply
    329.82x = 494.56 × 121.57
  4. Step 4: Simplify right side
    329.82x = 60,123.97
  5. Step 5: Solve for x
    x = 60,123.97/329.82
  6. Step 6: Final answer
    x = 182.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.