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Finding the Fourth Proportional to 289.95, 400.14 and 163.92

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Solution

The fourth proportional to 289.95, 400.14 and 163.92 is: 226.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.95 : 400.14 = 163.92 : x
  2. Step 2: Convert to fraction form
    289.95/400.14 = 163.92/x
  3. Step 3: Cross multiply
    289.95x = 400.14 × 163.92
  4. Step 4: Simplify right side
    289.95x = 65,591.83
  5. Step 5: Solve for x
    x = 65,591.83/289.95
  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.