Home / 378,189.18-521,914.31-206,121.48

Finding the Fourth Proportional to 378,189.18, 521,914.31 and 206,121.48

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Solution

The fourth proportional to 378,189.18, 521,914.31 and 206,121.48 is: 284,454.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,189.18 : 521,914.31 = 206,121.48 : x
  2. Step 2: Convert to fraction form
    378,189.18/521,914.31 = 206,121.48/x
  3. Step 3: Cross multiply
    378,189.18x = 521,914.31 × 206,121.48
  4. Step 4: Simplify right side
    378,189.18x = 107,577,752,778.92
  5. Step 5: Solve for x
    x = 107,577,752,778.92/378,189.18
  6. Step 6: Final answer
    x = 284,454.87

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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.