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Finding the Fourth Proportional to 225.95, 311.86 and 137.43

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Solution

The fourth proportional to 225.95, 311.86 and 137.43 is: 189.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.95 : 311.86 = 137.43 : x
  2. Step 2: Convert to fraction form
    225.95/311.86 = 137.43/x
  3. Step 3: Cross multiply
    225.95x = 311.86 × 137.43
  4. Step 4: Simplify right side
    225.95x = 42,857.92
  5. Step 5: Solve for x
    x = 42,857.92/225.95
  6. Step 6: Final answer
    x = 189.68

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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.