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Finding the Fourth Proportional to 327.42, 451.83 and 189.42

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Solution

The fourth proportional to 327.42, 451.83 and 189.42 is: 261.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.42 : 451.83 = 189.42 : x
  2. Step 2: Convert to fraction form
    327.42/451.83 = 189.42/x
  3. Step 3: Cross multiply
    327.42x = 451.83 × 189.42
  4. Step 4: Simplify right side
    327.42x = 85,585.64
  5. Step 5: Solve for x
    x = 85,585.64/327.42
  6. Step 6: Final answer
    x = 261.39

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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.