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Finding the Fourth Proportional to 262.22, 391.42 and 225.26

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Solution

The fourth proportional to 262.22, 391.42 and 225.26 is: 336.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.22 : 391.42 = 225.26 : x
  2. Step 2: Convert to fraction form
    262.22/391.42 = 225.26/x
  3. Step 3: Cross multiply
    262.22x = 391.42 × 225.26
  4. Step 4: Simplify right side
    262.22x = 88,171.27
  5. Step 5: Solve for x
    x = 88,171.27/262.22
  6. Step 6: Final answer
    x = 336.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.