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Finding the Fourth Proportional to 271.31, 374.43 and 154.88

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Solution

The fourth proportional to 271.31, 374.43 and 154.88 is: 213.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.31 : 374.43 = 154.88 : x
  2. Step 2: Convert to fraction form
    271.31/374.43 = 154.88/x
  3. Step 3: Cross multiply
    271.31x = 374.43 × 154.88
  4. Step 4: Simplify right side
    271.31x = 57,991.72
  5. Step 5: Solve for x
    x = 57,991.72/271.31
  6. Step 6: Final answer
    x = 213.75

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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.