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Finding the Fourth Proportional to 378,145.44, 521,863.92 and 208,379.52

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Solution

The fourth proportional to 378,145.44, 521,863.92 and 208,379.52 is: 287,576.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,145.44 : 521,863.92 = 208,379.52 : x
  2. Step 2: Convert to fraction form
    378,145.44/521,863.92 = 208,379.52/x
  3. Step 3: Cross multiply
    378,145.44x = 521,863.92 × 208,379.52
  4. Step 4: Simplify right side
    378,145.44x = 108,745,753,154.92
  5. Step 5: Solve for x
    x = 108,745,753,154.92/378,145.44
  6. Step 6: Final answer
    x = 287,576.53

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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.