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Finding the Fourth Proportional to 251.79, 377.41 and 121.71

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Solution

The fourth proportional to 251.79, 377.41 and 121.71 is: 182.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.79 : 377.41 = 121.71 : x
  2. Step 2: Convert to fraction form
    251.79/377.41 = 121.71/x
  3. Step 3: Cross multiply
    251.79x = 377.41 × 121.71
  4. Step 4: Simplify right side
    251.79x = 45,934.57
  5. Step 5: Solve for x
    x = 45,934.57/251.79
  6. Step 6: Final answer
    x = 182.43

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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.