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Finding the Fourth Proportional to 392.22, 541.26 and 226.43

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Solution

The fourth proportional to 392.22, 541.26 and 226.43 is: 312.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.22 : 541.26 = 226.43 : x
  2. Step 2: Convert to fraction form
    392.22/541.26 = 226.43/x
  3. Step 3: Cross multiply
    392.22x = 541.26 × 226.43
  4. Step 4: Simplify right side
    392.22x = 122,554.80
  5. Step 5: Solve for x
    x = 122,554.80/392.22
  6. Step 6: Final answer
    x = 312.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.