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Finding the Fourth Proportional to 271.62, 406.94 and 261.62

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Solution

The fourth proportional to 271.62, 406.94 and 261.62 is: 391.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.62 : 406.94 = 261.62 : x
  2. Step 2: Convert to fraction form
    271.62/406.94 = 261.62/x
  3. Step 3: Cross multiply
    271.62x = 406.94 × 261.62
  4. Step 4: Simplify right side
    271.62x = 106,463.64
  5. Step 5: Solve for x
    x = 106,463.64/271.62
  6. Step 6: Final answer
    x = 391.96

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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.