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Finding the Fourth Proportional to 274.58, 378.92 and 154.94

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Solution

The fourth proportional to 274.58, 378.92 and 154.94 is: 213.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.58 : 378.92 = 154.94 : x
  2. Step 2: Convert to fraction form
    274.58/378.92 = 154.94/x
  3. Step 3: Cross multiply
    274.58x = 378.92 × 154.94
  4. Step 4: Simplify right side
    274.58x = 58,709.78
  5. Step 5: Solve for x
    x = 58,709.78/274.58
  6. Step 6: Final answer
    x = 213.82

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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.