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Finding the Fourth Proportional to 371.11, 556.34 and 154.55

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Solution

The fourth proportional to 371.11, 556.34 and 154.55 is: 231.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.11 : 556.34 = 154.55 : x
  2. Step 2: Convert to fraction form
    371.11/556.34 = 154.55/x
  3. Step 3: Cross multiply
    371.11x = 556.34 × 154.55
  4. Step 4: Simplify right side
    371.11x = 85,981.57
  5. Step 5: Solve for x
    x = 85,981.57/371.11
  6. Step 6: Final answer
    x = 231.69

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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.