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Finding the Fourth Proportional to 274.54, 378.90 and 158.11

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Solution

The fourth proportional to 274.54, 378.90 and 158.11 is: 218.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.54 : 378.90 = 158.11 : x
  2. Step 2: Convert to fraction form
    274.54/378.90 = 158.11/x
  3. Step 3: Cross multiply
    274.54x = 378.90 × 158.11
  4. Step 4: Simplify right side
    274.54x = 59,907.88
  5. Step 5: Solve for x
    x = 59,907.88/274.54
  6. Step 6: Final answer
    x = 218.21

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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.