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Finding the Fourth Proportional to 274.52, 411.75 and 120.42

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Solution

The fourth proportional to 274.52, 411.75 and 120.42 is: 180.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.52 : 411.75 = 120.42 : x
  2. Step 2: Convert to fraction form
    274.52/411.75 = 120.42/x
  3. Step 3: Cross multiply
    274.52x = 411.75 × 120.42
  4. Step 4: Simplify right side
    274.52x = 49,582.94
  5. Step 5: Solve for x
    x = 49,582.94/274.52
  6. Step 6: Final answer
    x = 180.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.