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Finding the Fourth Proportional to 445.14, 667.66 and 120.48

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Solution

The fourth proportional to 445.14, 667.66 and 120.48 is: 180.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.14 : 667.66 = 120.48 : x
  2. Step 2: Convert to fraction form
    445.14/667.66 = 120.48/x
  3. Step 3: Cross multiply
    445.14x = 667.66 × 120.48
  4. Step 4: Simplify right side
    445.14x = 80,439.66
  5. Step 5: Solve for x
    x = 80,439.66/445.14
  6. Step 6: Final answer
    x = 180.71

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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.