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Finding the Fourth Proportional to 251.78, 349.18 and 235.94

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Solution

The fourth proportional to 251.78, 349.18 and 235.94 is: 327.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.78 : 349.18 = 235.94 : x
  2. Step 2: Convert to fraction form
    251.78/349.18 = 235.94/x
  3. Step 3: Cross multiply
    251.78x = 349.18 × 235.94
  4. Step 4: Simplify right side
    251.78x = 82,384.35
  5. Step 5: Solve for x
    x = 82,384.35/251.78
  6. Step 6: Final answer
    x = 327.21

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.