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Finding the Fourth Proportional to 263.85, 395.91 and 126.89

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Solution

The fourth proportional to 263.85, 395.91 and 126.89 is: 190.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.85 : 395.91 = 126.89 : x
  2. Step 2: Convert to fraction form
    263.85/395.91 = 126.89/x
  3. Step 3: Cross multiply
    263.85x = 395.91 × 126.89
  4. Step 4: Simplify right side
    263.85x = 50,235.04
  5. Step 5: Solve for x
    x = 50,235.04/263.85
  6. Step 6: Final answer
    x = 190.39

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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.