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Finding the Fourth Proportional to 371.14, 556.69 and 127.66

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Solution

The fourth proportional to 371.14, 556.69 and 127.66 is: 191.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.14 : 556.69 = 127.66 : x
  2. Step 2: Convert to fraction form
    371.14/556.69 = 127.66/x
  3. Step 3: Cross multiply
    371.14x = 556.69 × 127.66
  4. Step 4: Simplify right side
    371.14x = 71,067.05
  5. Step 5: Solve for x
    x = 71,067.05/371.14
  6. Step 6: Final answer
    x = 191.48

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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.