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Finding the Fourth Proportional to 818.49, 1,227.44 and 270.59

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Solution

The fourth proportional to 818.49, 1,227.44 and 270.59 is: 405.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.49 : 1,227.44 = 270.59 : x
  2. Step 2: Convert to fraction form
    818.49/1,227.44 = 270.59/x
  3. Step 3: Cross multiply
    818.49x = 1,227.44 × 270.59
  4. Step 4: Simplify right side
    818.49x = 332,136.73
  5. Step 5: Solve for x
    x = 332,136.73/818.49
  6. Step 6: Final answer
    x = 405.79

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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.