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Finding the Fourth Proportional to 323.87, 446.79 and 199.45

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Solution

The fourth proportional to 323.87, 446.79 and 199.45 is: 275.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.87 : 446.79 = 199.45 : x
  2. Step 2: Convert to fraction form
    323.87/446.79 = 199.45/x
  3. Step 3: Cross multiply
    323.87x = 446.79 × 199.45
  4. Step 4: Simplify right side
    323.87x = 89,111.15
  5. Step 5: Solve for x
    x = 89,111.15/323.87
  6. Step 6: Final answer
    x = 275.15

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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.