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Finding the Fourth Proportional to 323.12, 445.74 and 229.88

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Solution

The fourth proportional to 323.12, 445.74 and 229.88 is: 317.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.12 : 445.74 = 229.88 : x
  2. Step 2: Convert to fraction form
    323.12/445.74 = 229.88/x
  3. Step 3: Cross multiply
    323.12x = 445.74 × 229.88
  4. Step 4: Simplify right side
    323.12x = 102,466.71
  5. Step 5: Solve for x
    x = 102,466.71/323.12
  6. Step 6: Final answer
    x = 317.12

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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.