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Finding the Fourth Proportional to 251.79, 345.39 and 238.56

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Solution

The fourth proportional to 251.79, 345.39 and 238.56 is: 327.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.79 : 345.39 = 238.56 : x
  2. Step 2: Convert to fraction form
    251.79/345.39 = 238.56/x
  3. Step 3: Cross multiply
    251.79x = 345.39 × 238.56
  4. Step 4: Simplify right side
    251.79x = 82,396.24
  5. Step 5: Solve for x
    x = 82,396.24/251.79
  6. Step 6: Final answer
    x = 327.24

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.