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Finding the Fourth Proportional to 290.10, 400.22 and 196.94

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Solution

The fourth proportional to 290.10, 400.22 and 196.94 is: 271.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.10 : 400.22 = 196.94 : x
  2. Step 2: Convert to fraction form
    290.10/400.22 = 196.94/x
  3. Step 3: Cross multiply
    290.10x = 400.22 × 196.94
  4. Step 4: Simplify right side
    290.10x = 78,819.33
  5. Step 5: Solve for x
    x = 78,819.33/290.10
  6. Step 6: Final answer
    x = 271.70

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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.