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Finding the Fourth Proportional to 225.94, 338.84 and 139.26

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Solution

The fourth proportional to 225.94, 338.84 and 139.26 is: 208.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.94 : 338.84 = 139.26 : x
  2. Step 2: Convert to fraction form
    225.94/338.84 = 139.26/x
  3. Step 3: Cross multiply
    225.94x = 338.84 × 139.26
  4. Step 4: Simplify right side
    225.94x = 47,186.86
  5. Step 5: Solve for x
    x = 47,186.86/225.94
  6. Step 6: Final answer
    x = 208.85

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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.