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Finding the Fourth Proportional to 226.44, 312.40 and 139.12

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Solution

The fourth proportional to 226.44, 312.40 and 139.12 is: 191.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.44 : 312.40 = 139.12 : x
  2. Step 2: Convert to fraction form
    226.44/312.40 = 139.12/x
  3. Step 3: Cross multiply
    226.44x = 312.40 × 139.12
  4. Step 4: Simplify right side
    226.44x = 43,461.09
  5. Step 5: Solve for x
    x = 43,461.09/226.44
  6. Step 6: Final answer
    x = 191.93

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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.