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Finding the Fourth Proportional to 418.26, 626.91 and 226.02

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Solution

The fourth proportional to 418.26, 626.91 and 226.02 is: 338.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.26 : 626.91 = 226.02 : x
  2. Step 2: Convert to fraction form
    418.26/626.91 = 226.02/x
  3. Step 3: Cross multiply
    418.26x = 626.91 × 226.02
  4. Step 4: Simplify right side
    418.26x = 141,694.20
  5. Step 5: Solve for x
    x = 141,694.20/418.26
  6. Step 6: Final answer
    x = 338.77

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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.