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Finding the Fourth Proportional to 263.87, 395.80 and 71.49

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Solution

The fourth proportional to 263.87, 395.80 and 71.49 is: 107.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.87 : 395.80 = 71.49 : x
  2. Step 2: Convert to fraction form
    263.87/395.80 = 71.49/x
  3. Step 3: Cross multiply
    263.87x = 395.80 × 71.49
  4. Step 4: Simplify right side
    263.87x = 28,295.56
  5. Step 5: Solve for x
    x = 28,295.56/263.87
  6. Step 6: Final answer
    x = 107.24

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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.