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Finding the Fourth Proportional to 225.86, 338.80 and 139.14

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Solution

The fourth proportional to 225.86, 338.80 and 139.14 is: 208.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.86 : 338.80 = 139.14 : x
  2. Step 2: Convert to fraction form
    225.86/338.80 = 139.14/x
  3. Step 3: Cross multiply
    225.86x = 338.80 × 139.14
  4. Step 4: Simplify right side
    225.86x = 47,138.24
  5. Step 5: Solve for x
    x = 47,138.24/225.86
  6. Step 6: Final answer
    x = 208.71

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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.