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Finding the Fourth Proportional to 263.78, 395.76 and 126.95

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Solution

The fourth proportional to 263.78, 395.76 and 126.95 is: 190.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.78 : 395.76 = 126.95 : x
  2. Step 2: Convert to fraction form
    263.78/395.76 = 126.95/x
  3. Step 3: Cross multiply
    263.78x = 395.76 × 126.95
  4. Step 4: Simplify right side
    263.78x = 50,239.75
  5. Step 5: Solve for x
    x = 50,239.75/263.78
  6. Step 6: Final answer
    x = 190.46

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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.