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Finding the Fourth Proportional to 323.81, 446.63 and 199.42

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Solution

The fourth proportional to 323.81, 446.63 and 199.42 is: 275.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.81 : 446.63 = 199.42 : x
  2. Step 2: Convert to fraction form
    323.81/446.63 = 199.42/x
  3. Step 3: Cross multiply
    323.81x = 446.63 × 199.42
  4. Step 4: Simplify right side
    323.81x = 89,066.34
  5. Step 5: Solve for x
    x = 89,066.34/323.81
  6. Step 6: Final answer
    x = 275.06

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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.