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Finding the Fourth Proportional to 263.72, 395.94 and 220.76

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Solution

The fourth proportional to 263.72, 395.94 and 220.76 is: 331.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.72 : 395.94 = 220.76 : x
  2. Step 2: Convert to fraction form
    263.72/395.94 = 220.76/x
  3. Step 3: Cross multiply
    263.72x = 395.94 × 220.76
  4. Step 4: Simplify right side
    263.72x = 87,407.71
  5. Step 5: Solve for x
    x = 87,407.71/263.72
  6. Step 6: Final answer
    x = 331.44

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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.