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Finding the Fourth Proportional to 263.65, 395.49 and 81.03

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Solution

The fourth proportional to 263.65, 395.49 and 81.03 is: 121.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.65 : 395.49 = 81.03 : x
  2. Step 2: Convert to fraction form
    263.65/395.49 = 81.03/x
  3. Step 3: Cross multiply
    263.65x = 395.49 × 81.03
  4. Step 4: Simplify right side
    263.65x = 32,046.55
  5. Step 5: Solve for x
    x = 32,046.55/263.65
  6. Step 6: Final answer
    x = 121.55

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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.