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Finding the Fourth Proportional to 329.89, 495.05 and 147.44

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Solution

The fourth proportional to 329.89, 495.05 and 147.44 is: 221.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.89 : 495.05 = 147.44 : x
  2. Step 2: Convert to fraction form
    329.89/495.05 = 147.44/x
  3. Step 3: Cross multiply
    329.89x = 495.05 × 147.44
  4. Step 4: Simplify right side
    329.89x = 72,986.96
  5. Step 5: Solve for x
    x = 72,986.96/329.89
  6. Step 6: Final answer
    x = 221.25

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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.