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Finding the Fourth Proportional to 238.14, 356.37 and 199.66

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Solution

The fourth proportional to 238.14, 356.37 and 199.66 is: 298.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.14 : 356.37 = 199.66 : x
  2. Step 2: Convert to fraction form
    238.14/356.37 = 199.66/x
  3. Step 3: Cross multiply
    238.14x = 356.37 × 199.66
  4. Step 4: Simplify right side
    238.14x = 71,152.83
  5. Step 5: Solve for x
    x = 71,152.83/238.14
  6. Step 6: Final answer
    x = 298.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.