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Finding the Fourth Proportional to 283.85, 391.55 and 196.37

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Solution

The fourth proportional to 283.85, 391.55 and 196.37 is: 270.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.85 : 391.55 = 196.37 : x
  2. Step 2: Convert to fraction form
    283.85/391.55 = 196.37/x
  3. Step 3: Cross multiply
    283.85x = 391.55 × 196.37
  4. Step 4: Simplify right side
    283.85x = 76,887.21
  5. Step 5: Solve for x
    x = 76,887.21/283.85
  6. Step 6: Final answer
    x = 270.88

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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.