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Finding the Fourth Proportional to 226.44, 312.45 and 139.09

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Solution

The fourth proportional to 226.44, 312.45 and 139.09 is: 191.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.44 : 312.45 = 139.09 : x
  2. Step 2: Convert to fraction form
    226.44/312.45 = 139.09/x
  3. Step 3: Cross multiply
    226.44x = 312.45 × 139.09
  4. Step 4: Simplify right side
    226.44x = 43,458.67
  5. Step 5: Solve for x
    x = 43,458.67/226.44
  6. Step 6: Final answer
    x = 191.92

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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.