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Finding the Fourth Proportional to 219.97, 303.58 and 126.71

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Solution

The fourth proportional to 219.97, 303.58 and 126.71 is: 174.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.97 : 303.58 = 126.71 : x
  2. Step 2: Convert to fraction form
    219.97/303.58 = 126.71/x
  3. Step 3: Cross multiply
    219.97x = 303.58 × 126.71
  4. Step 4: Simplify right side
    219.97x = 38,467.75
  5. Step 5: Solve for x
    x = 38,467.75/219.97
  6. Step 6: Final answer
    x = 174.88

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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.