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Finding the Fourth Proportional to 378,171.44, 521,876.67 and 206,089.45

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Solution

The fourth proportional to 378,171.44, 521,876.67 and 206,089.45 is: 284,403.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,171.44 : 521,876.67 = 206,089.45 : x
  2. Step 2: Convert to fraction form
    378,171.44/521,876.67 = 206,089.45/x
  3. Step 3: Cross multiply
    378,171.44x = 521,876.67 × 206,089.45
  4. Step 4: Simplify right side
    378,171.44x = 107,553,277,313.31
  5. Step 5: Solve for x
    x = 107,553,277,313.31/378,171.44
  6. Step 6: Final answer
    x = 284,403.49

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1.5x scale

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.