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Finding the Fourth Proportional to 371.32, 557.10 and 127.84

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Solution

The fourth proportional to 371.32, 557.10 and 127.84 is: 191.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.32 : 557.10 = 127.84 : x
  2. Step 2: Convert to fraction form
    371.32/557.10 = 127.84/x
  3. Step 3: Cross multiply
    371.32x = 557.10 × 127.84
  4. Step 4: Simplify right side
    371.32x = 71,219.66
  5. Step 5: Solve for x
    x = 71,219.66/371.32
  6. Step 6: Final answer
    x = 191.80

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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.