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Finding the Fourth Proportional to 300.77, 451.09 and 115.61

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Solution

The fourth proportional to 300.77, 451.09 and 115.61 is: 173.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.77 : 451.09 = 115.61 : x
  2. Step 2: Convert to fraction form
    300.77/451.09 = 115.61/x
  3. Step 3: Cross multiply
    300.77x = 451.09 × 115.61
  4. Step 4: Simplify right side
    300.77x = 52,147.68
  5. Step 5: Solve for x
    x = 52,147.68/300.77
  6. Step 6: Final answer
    x = 173.38

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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.