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Finding the Fourth Proportional to 409, 613.62 and 226.36

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Solution

The fourth proportional to 409, 613.62 and 226.36 is: 339.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    409 : 613.62 = 226.36 : x
  2. Step 2: Convert to fraction form
    409/613.62 = 226.36/x
  3. Step 3: Cross multiply
    409x = 613.62 × 226.36
  4. Step 4: Simplify right side
    409x = 138,899.02
  5. Step 5: Solve for x
    x = 138,899.02/409
  6. Step 6: Final answer
    x = 339.61

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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.