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Finding the Fourth Proportional to 253.94, 378.27 and 238.41

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Solution

The fourth proportional to 253.94, 378.27 and 238.41 is: 355.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.94 : 378.27 = 238.41 : x
  2. Step 2: Convert to fraction form
    253.94/378.27 = 238.41/x
  3. Step 3: Cross multiply
    253.94x = 378.27 × 238.41
  4. Step 4: Simplify right side
    253.94x = 90,183.35
  5. Step 5: Solve for x
    x = 90,183.35/253.94
  6. Step 6: Final answer
    x = 355.14

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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.