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Finding the Fourth Proportional to 251.78, 347 and 177.92

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Solution

The fourth proportional to 251.78, 347 and 177.92 is: 245.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.78 : 347 = 177.92 : x
  2. Step 2: Convert to fraction form
    251.78/347 = 177.92/x
  3. Step 3: Cross multiply
    251.78x = 347 × 177.92
  4. Step 4: Simplify right side
    251.78x = 61,738.24
  5. Step 5: Solve for x
    x = 61,738.24/251.78
  6. Step 6: Final answer
    x = 245.21

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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.