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Finding the Fourth Proportional to 300.39, 414.26 and 189.67

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Solution

The fourth proportional to 300.39, 414.26 and 189.67 is: 261.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.39 : 414.26 = 189.67 : x
  2. Step 2: Convert to fraction form
    300.39/414.26 = 189.67/x
  3. Step 3: Cross multiply
    300.39x = 414.26 × 189.67
  4. Step 4: Simplify right side
    300.39x = 78,573.73
  5. Step 5: Solve for x
    x = 78,573.73/300.39
  6. Step 6: Final answer
    x = 261.57

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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.