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Finding the Fourth Proportional to 329.45, 494.12 and 146.79

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Solution

The fourth proportional to 329.45, 494.12 and 146.79 is: 220.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.45 : 494.12 = 146.79 : x
  2. Step 2: Convert to fraction form
    329.45/494.12 = 146.79/x
  3. Step 3: Cross multiply
    329.45x = 494.12 × 146.79
  4. Step 4: Simplify right side
    329.45x = 72,532.24
  5. Step 5: Solve for x
    x = 72,532.24/329.45
  6. Step 6: Final answer
    x = 220.16

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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.