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Finding the Fourth Proportional to 271.74, 374.18 and 240.78

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Solution

The fourth proportional to 271.74, 374.18 and 240.78 is: 331.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.74 : 374.18 = 240.78 : x
  2. Step 2: Convert to fraction form
    271.74/374.18 = 240.78/x
  3. Step 3: Cross multiply
    271.74x = 374.18 × 240.78
  4. Step 4: Simplify right side
    271.74x = 90,093.86
  5. Step 5: Solve for x
    x = 90,093.86/271.74
  6. Step 6: Final answer
    x = 331.54

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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.