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Finding the Fourth Proportional to 263, 394.38 and 100.68

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Solution

The fourth proportional to 263, 394.38 and 100.68 is: 150.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    263 : 394.38 = 100.68 : x
  2. Step 2: Convert to fraction form
    263/394.38 = 100.68/x
  3. Step 3: Cross multiply
    263x = 394.38 × 100.68
  4. Step 4: Simplify right side
    263x = 39,706.18
  5. Step 5: Solve for x
    x = 39,706.18/263
  6. Step 6: Final answer
    x = 150.97

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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.