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Finding the Fourth Proportional to 213.57, 294.64 and 126.09

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Solution

The fourth proportional to 213.57, 294.64 and 126.09 is: 173.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.57 : 294.64 = 126.09 : x
  2. Step 2: Convert to fraction form
    213.57/294.64 = 126.09/x
  3. Step 3: Cross multiply
    213.57x = 294.64 × 126.09
  4. Step 4: Simplify right side
    213.57x = 37,150.84
  5. Step 5: Solve for x
    x = 37,150.84/213.57
  6. Step 6: Final answer
    x = 173.95

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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.