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Finding the Fourth Proportional to 418.25, 626.36 and 255.44

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Solution

The fourth proportional to 418.25, 626.36 and 255.44 is: 382.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.25 : 626.36 = 255.44 : x
  2. Step 2: Convert to fraction form
    418.25/626.36 = 255.44/x
  3. Step 3: Cross multiply
    418.25x = 626.36 × 255.44
  4. Step 4: Simplify right side
    418.25x = 159,992.99
  5. Step 5: Solve for x
    x = 159,992.99/418.25
  6. Step 6: Final answer
    x = 382.53

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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.