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Finding the Fourth Proportional to 163.91, 226.08 and 154.12

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Solution

The fourth proportional to 163.91, 226.08 and 154.12 is: 212.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.91 : 226.08 = 154.12 : x
  2. Step 2: Convert to fraction form
    163.91/226.08 = 154.12/x
  3. Step 3: Cross multiply
    163.91x = 226.08 × 154.12
  4. Step 4: Simplify right side
    163.91x = 34,843.45
  5. Step 5: Solve for x
    x = 34,843.45/163.91
  6. Step 6: Final answer
    x = 212.58

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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.