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Finding the Fourth Proportional to 274.75, 378.56 and 267.92

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Solution

The fourth proportional to 274.75, 378.56 and 267.92 is: 369.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.75 : 378.56 = 267.92 : x
  2. Step 2: Convert to fraction form
    274.75/378.56 = 267.92/x
  3. Step 3: Cross multiply
    274.75x = 378.56 × 267.92
  4. Step 4: Simplify right side
    274.75x = 101,423.80
  5. Step 5: Solve for x
    x = 101,423.80/274.75
  6. Step 6: Final answer
    x = 369.15

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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.