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Finding the Fourth Proportional to 329.46, 454.51 and 189.55

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Solution

The fourth proportional to 329.46, 454.51 and 189.55 is: 261.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.46 : 454.51 = 189.55 : x
  2. Step 2: Convert to fraction form
    329.46/454.51 = 189.55/x
  3. Step 3: Cross multiply
    329.46x = 454.51 × 189.55
  4. Step 4: Simplify right side
    329.46x = 86,150.62
  5. Step 5: Solve for x
    x = 86,150.62/329.46
  6. Step 6: Final answer
    x = 261.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.