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Finding the Fourth Proportional to 278.89, 418.19 and 163.37

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Solution

The fourth proportional to 278.89, 418.19 and 163.37 is: 244.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.89 : 418.19 = 163.37 : x
  2. Step 2: Convert to fraction form
    278.89/418.19 = 163.37/x
  3. Step 3: Cross multiply
    278.89x = 418.19 × 163.37
  4. Step 4: Simplify right side
    278.89x = 68,318.25
  5. Step 5: Solve for x
    x = 68,318.25/278.89
  6. Step 6: Final answer
    x = 244.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.