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Finding the Fourth Proportional to 288.34, 397.81 and 163.96

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Solution

The fourth proportional to 288.34, 397.81 and 163.96 is: 226.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.34 : 397.81 = 163.96 : x
  2. Step 2: Convert to fraction form
    288.34/397.81 = 163.96/x
  3. Step 3: Cross multiply
    288.34x = 397.81 × 163.96
  4. Step 4: Simplify right side
    288.34x = 65,224.93
  5. Step 5: Solve for x
    x = 65,224.93/288.34
  6. Step 6: Final answer
    x = 226.21

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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.