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Finding the Fourth Proportional to 263.70, 395.55 and 191.88

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Solution

The fourth proportional to 263.70, 395.55 and 191.88 is: 287.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.70 : 395.55 = 191.88 : x
  2. Step 2: Convert to fraction form
    263.70/395.55 = 191.88/x
  3. Step 3: Cross multiply
    263.70x = 395.55 × 191.88
  4. Step 4: Simplify right side
    263.70x = 75,898.13
  5. Step 5: Solve for x
    x = 75,898.13/263.70
  6. Step 6: Final answer
    x = 287.82

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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.