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Finding the Fourth Proportional to 219.91, 303.41 and 126.68

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Solution

The fourth proportional to 219.91, 303.41 and 126.68 is: 174.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.91 : 303.41 = 126.68 : x
  2. Step 2: Convert to fraction form
    219.91/303.41 = 126.68/x
  3. Step 3: Cross multiply
    219.91x = 303.41 × 126.68
  4. Step 4: Simplify right side
    219.91x = 38,435.98
  5. Step 5: Solve for x
    x = 38,435.98/219.91
  6. Step 6: Final answer
    x = 174.78

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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.