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Finding the Fourth Proportional to 329.54, 494.15 and 146.66

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Solution

The fourth proportional to 329.54, 494.15 and 146.66 is: 219.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.54 : 494.15 = 146.66 : x
  2. Step 2: Convert to fraction form
    329.54/494.15 = 146.66/x
  3. Step 3: Cross multiply
    329.54x = 494.15 × 146.66
  4. Step 4: Simplify right side
    329.54x = 72,468.83
  5. Step 5: Solve for x
    x = 72,468.83/329.54
  6. Step 6: Final answer
    x = 219.91

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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.