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Finding the Fourth Proportional to 323.21, 445.96 and 190.39

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Solution

The fourth proportional to 323.21, 445.96 and 190.39 is: 262.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.21 : 445.96 = 190.39 : x
  2. Step 2: Convert to fraction form
    323.21/445.96 = 190.39/x
  3. Step 3: Cross multiply
    323.21x = 445.96 × 190.39
  4. Step 4: Simplify right side
    323.21x = 84,906.32
  5. Step 5: Solve for x
    x = 84,906.32/323.21
  6. Step 6: Final answer
    x = 262.70

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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.