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Finding the Fourth Proportional to 329.96, 494.98 and 147.31

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Solution

The fourth proportional to 329.96, 494.98 and 147.31 is: 220.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.96 : 494.98 = 147.31 : x
  2. Step 2: Convert to fraction form
    329.96/494.98 = 147.31/x
  3. Step 3: Cross multiply
    329.96x = 494.98 × 147.31
  4. Step 4: Simplify right side
    329.96x = 72,913.90
  5. Step 5: Solve for x
    x = 72,913.90/329.96
  6. Step 6: Final answer
    x = 220.98

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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.