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Finding the Fourth Proportional to 281.97, 389.21 and 163.97

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Solution

The fourth proportional to 281.97, 389.21 and 163.97 is: 226.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.97 : 389.21 = 163.97 : x
  2. Step 2: Convert to fraction form
    281.97/389.21 = 163.97/x
  3. Step 3: Cross multiply
    281.97x = 389.21 × 163.97
  4. Step 4: Simplify right side
    281.97x = 63,819.65
  5. Step 5: Solve for x
    x = 63,819.65/281.97
  6. Step 6: Final answer
    x = 226.33

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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.