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Finding the Fourth Proportional to 299.78, 447.94 and 238.26

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Solution

The fourth proportional to 299.78, 447.94 and 238.26 is: 356.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.78 : 447.94 = 238.26 : x
  2. Step 2: Convert to fraction form
    299.78/447.94 = 238.26/x
  3. Step 3: Cross multiply
    299.78x = 447.94 × 238.26
  4. Step 4: Simplify right side
    299.78x = 106,726.18
  5. Step 5: Solve for x
    x = 106,726.18/299.78
  6. Step 6: Final answer
    x = 356.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.