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Finding the Fourth Proportional to 371.43, 556.98 and 127.98

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Solution

The fourth proportional to 371.43, 556.98 and 127.98 is: 191.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.43 : 556.98 = 127.98 : x
  2. Step 2: Convert to fraction form
    371.43/556.98 = 127.98/x
  3. Step 3: Cross multiply
    371.43x = 556.98 × 127.98
  4. Step 4: Simplify right side
    371.43x = 71,282.30
  5. Step 5: Solve for x
    x = 71,282.30/371.43
  6. Step 6: Final answer
    x = 191.91

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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.