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Finding the Fourth Proportional to 445.18, 667.70 and 120.58

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Solution

The fourth proportional to 445.18, 667.70 and 120.58 is: 180.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.18 : 667.70 = 120.58 : x
  2. Step 2: Convert to fraction form
    445.18/667.70 = 120.58/x
  3. Step 3: Cross multiply
    445.18x = 667.70 × 120.58
  4. Step 4: Simplify right side
    445.18x = 80,511.27
  5. Step 5: Solve for x
    x = 80,511.27/445.18
  6. Step 6: Final answer
    x = 180.85

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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.