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Finding the Fourth Proportional to 260.96, 391.95 and 222.48

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Solution

The fourth proportional to 260.96, 391.95 and 222.48 is: 334.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.96 : 391.95 = 222.48 : x
  2. Step 2: Convert to fraction form
    260.96/391.95 = 222.48/x
  3. Step 3: Cross multiply
    260.96x = 391.95 × 222.48
  4. Step 4: Simplify right side
    260.96x = 87,201.04
  5. Step 5: Solve for x
    x = 87,201.04/260.96
  6. Step 6: Final answer
    x = 334.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.