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Finding the Fourth Proportional to 225.11, 309.90 and 194.43

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Solution

The fourth proportional to 225.11, 309.90 and 194.43 is: 267.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.11 : 309.90 = 194.43 : x
  2. Step 2: Convert to fraction form
    225.11/309.90 = 194.43/x
  3. Step 3: Cross multiply
    225.11x = 309.90 × 194.43
  4. Step 4: Simplify right side
    225.11x = 60,253.86
  5. Step 5: Solve for x
    x = 60,253.86/225.11
  6. Step 6: Final answer
    x = 267.67

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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.