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Finding the Fourth Proportional to 263.81, 395.78 and 225.56

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Solution

The fourth proportional to 263.81, 395.78 and 225.56 is: 338.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.81 : 395.78 = 225.56 : x
  2. Step 2: Convert to fraction form
    263.81/395.78 = 225.56/x
  3. Step 3: Cross multiply
    263.81x = 395.78 × 225.56
  4. Step 4: Simplify right side
    263.81x = 89,272.14
  5. Step 5: Solve for x
    x = 89,272.14/263.81
  6. Step 6: Final answer
    x = 338.40

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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.