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Finding the Fourth Proportional to 216.71, 323.89 and 199.41

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Solution

The fourth proportional to 216.71, 323.89 and 199.41 is: 298.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.71 : 323.89 = 199.41 : x
  2. Step 2: Convert to fraction form
    216.71/323.89 = 199.41/x
  3. Step 3: Cross multiply
    216.71x = 323.89 × 199.41
  4. Step 4: Simplify right side
    216.71x = 64,584.29
  5. Step 5: Solve for x
    x = 64,584.29/216.71
  6. Step 6: Final answer
    x = 298.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.