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Finding the Fourth Proportional to 371.27, 557.00 and 127.81

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Solution

The fourth proportional to 371.27, 557.00 and 127.81 is: 191.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.27 : 557.00 = 127.81 : x
  2. Step 2: Convert to fraction form
    371.27/557.00 = 127.81/x
  3. Step 3: Cross multiply
    371.27x = 557.00 × 127.81
  4. Step 4: Simplify right side
    371.27x = 71,188.14
  5. Step 5: Solve for x
    x = 71,188.14/371.27
  6. Step 6: Final answer
    x = 191.74

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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.