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Finding the Fourth Proportional to 371.22, 557.10 and 255.36

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Solution

The fourth proportional to 371.22, 557.10 and 255.36 is: 383.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.22 : 557.10 = 255.36 : x
  2. Step 2: Convert to fraction form
    371.22/557.10 = 255.36/x
  3. Step 3: Cross multiply
    371.22x = 557.10 × 255.36
  4. Step 4: Simplify right side
    371.22x = 142,261.06
  5. Step 5: Solve for x
    x = 142,261.06/371.22
  6. Step 6: Final answer
    x = 383.23

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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.