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Finding the Fourth Proportional to 263.62, 395.43 and 126.64

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Solution

The fourth proportional to 263.62, 395.43 and 126.64 is: 189.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.62 : 395.43 = 126.64 : x
  2. Step 2: Convert to fraction form
    263.62/395.43 = 126.64/x
  3. Step 3: Cross multiply
    263.62x = 395.43 × 126.64
  4. Step 4: Simplify right side
    263.62x = 50,074.64
  5. Step 5: Solve for x
    x = 50,074.64/263.62
  6. Step 6: Final answer
    x = 189.95

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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.