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Finding the Fourth Proportional to 371.22, 556.77 and 127.74

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Solution

The fourth proportional to 371.22, 556.77 and 127.74 is: 191.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.22 : 556.77 = 127.74 : x
  2. Step 2: Convert to fraction form
    371.22/556.77 = 127.74/x
  3. Step 3: Cross multiply
    371.22x = 556.77 × 127.74
  4. Step 4: Simplify right side
    371.22x = 71,121.80
  5. Step 5: Solve for x
    x = 71,121.80/371.22
  6. Step 6: Final answer
    x = 191.59

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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.