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Finding the Fourth Proportional to 412.26, 618.09 and 238.68

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Solution

The fourth proportional to 412.26, 618.09 and 238.68 is: 357.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.26 : 618.09 = 238.68 : x
  2. Step 2: Convert to fraction form
    412.26/618.09 = 238.68/x
  3. Step 3: Cross multiply
    412.26x = 618.09 × 238.68
  4. Step 4: Simplify right side
    412.26x = 147,525.72
  5. Step 5: Solve for x
    x = 147,525.72/412.26
  6. Step 6: Final answer
    x = 357.85

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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.