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Finding the Fourth Proportional to 271.69, 406.61 and 163.56

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Solution

The fourth proportional to 271.69, 406.61 and 163.56 is: 244.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.69 : 406.61 = 163.56 : x
  2. Step 2: Convert to fraction form
    271.69/406.61 = 163.56/x
  3. Step 3: Cross multiply
    271.69x = 406.61 × 163.56
  4. Step 4: Simplify right side
    271.69x = 66,503.51
  5. Step 5: Solve for x
    x = 66,503.51/271.69
  6. Step 6: Final answer
    x = 244.78

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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.