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Finding the Fourth Proportional to 245.75, 338.76 and 196.61

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Solution

The fourth proportional to 245.75, 338.76 and 196.61 is: 271.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.75 : 338.76 = 196.61 : x
  2. Step 2: Convert to fraction form
    245.75/338.76 = 196.61/x
  3. Step 3: Cross multiply
    245.75x = 338.76 × 196.61
  4. Step 4: Simplify right side
    245.75x = 66,601.91
  5. Step 5: Solve for x
    x = 66,601.91/245.75
  6. Step 6: Final answer
    x = 271.02

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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.