Home / 378,191.05-521,890.40-206,105.51

Finding the Fourth Proportional to 378,191.05, 521,890.40 and 206,105.51

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Solution

The fourth proportional to 378,191.05, 521,890.40 and 206,105.51 is: 284,418.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,191.05 : 521,890.40 = 206,105.51 : x
  2. Step 2: Convert to fraction form
    378,191.05/521,890.40 = 206,105.51/x
  3. Step 3: Cross multiply
    378,191.05x = 521,890.40 × 206,105.51
  4. Step 4: Simplify right side
    378,191.05x = 107,564,488,876.09
  5. Step 5: Solve for x
    x = 107,564,488,876.09/378,191.05
  6. Step 6: Final answer
    x = 284,418.39

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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.