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Finding the Fourth Proportional to 818.39, 1,227.68 and 270.63

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Solution

The fourth proportional to 818.39, 1,227.68 and 270.63 is: 405.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.39 : 1,227.68 = 270.63 : x
  2. Step 2: Convert to fraction form
    818.39/1,227.68 = 270.63/x
  3. Step 3: Cross multiply
    818.39x = 1,227.68 × 270.63
  4. Step 4: Simplify right side
    818.39x = 332,245.69
  5. Step 5: Solve for x
    x = 332,245.69/818.39
  6. Step 6: Final answer
    x = 405.98

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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.