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Finding the Fourth Proportional to 818.34, 1,227.42 and 270.48

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Solution

The fourth proportional to 818.34, 1,227.42 and 270.48 is: 405.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.34 : 1,227.42 = 270.48 : x
  2. Step 2: Convert to fraction form
    818.34/1,227.42 = 270.48/x
  3. Step 3: Cross multiply
    818.34x = 1,227.42 × 270.48
  4. Step 4: Simplify right side
    818.34x = 331,992.56
  5. Step 5: Solve for x
    x = 331,992.56/818.34
  6. Step 6: Final answer
    x = 405.69

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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.