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Finding the Fourth Proportional to 371.35, 557.16 and 127.73

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Solution

The fourth proportional to 371.35, 557.16 and 127.73 is: 191.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.35 : 557.16 = 127.73 : x
  2. Step 2: Convert to fraction form
    371.35/557.16 = 127.73/x
  3. Step 3: Cross multiply
    371.35x = 557.16 × 127.73
  4. Step 4: Simplify right side
    371.35x = 71,166.05
  5. Step 5: Solve for x
    x = 71,166.05/371.35
  6. Step 6: Final answer
    x = 191.64

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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.