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Finding the Fourth Proportional to 323.22, 445.74 and 279.12

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Solution

The fourth proportional to 323.22, 445.74 and 279.12 is: 384.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.22 : 445.74 = 279.12 : x
  2. Step 2: Convert to fraction form
    323.22/445.74 = 279.12/x
  3. Step 3: Cross multiply
    323.22x = 445.74 × 279.12
  4. Step 4: Simplify right side
    323.22x = 124,414.95
  5. Step 5: Solve for x
    x = 124,414.95/323.22
  6. Step 6: Final answer
    x = 384.92

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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.