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Finding the Fourth Proportional to 393,770.52, 543,404.97 and 221,691.42

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Solution

The fourth proportional to 393,770.52, 543,404.97 and 221,691.42 is: 305,935.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,770.52 : 543,404.97 = 221,691.42 : x
  2. Step 2: Convert to fraction form
    393,770.52/543,404.97 = 221,691.42/x
  3. Step 3: Cross multiply
    393,770.52x = 543,404.97 × 221,691.42
  4. Step 4: Simplify right side
    393,770.52x = 120,468,219,434.36
  5. Step 5: Solve for x
    x = 120,468,219,434.36/393,770.52
  6. Step 6: Final answer
    x = 305,935.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.