Home / 378,215.43-521,921.92-206,129.74

Finding the Fourth Proportional to 378,215.43, 521,921.92 and 206,129.74

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Solution

The fourth proportional to 378,215.43, 521,921.92 and 206,129.74 is: 284,450.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,215.43 : 521,921.92 = 206,129.74 : x
  2. Step 2: Convert to fraction form
    378,215.43/521,921.92 = 206,129.74/x
  3. Step 3: Cross multiply
    378,215.43x = 521,921.92 × 206,129.74
  4. Step 4: Simplify right side
    378,215.43x = 107,583,629,669.90
  5. Step 5: Solve for x
    x = 107,583,629,669.90/378,215.43
  6. Step 6: Final answer
    x = 284,450.66

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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.