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Finding the Fourth Proportional to 323.11, 445.21 and 219.43

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Solution

The fourth proportional to 323.11, 445.21 and 219.43 is: 302.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.11 : 445.21 = 219.43 : x
  2. Step 2: Convert to fraction form
    323.11/445.21 = 219.43/x
  3. Step 3: Cross multiply
    323.11x = 445.21 × 219.43
  4. Step 4: Simplify right side
    323.11x = 97,692.43
  5. Step 5: Solve for x
    x = 97,692.43/323.11
  6. Step 6: Final answer
    x = 302.35

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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.