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Finding the Fourth Proportional to 378,517.27, 522,354.30 and 206,435.51

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Solution

The fourth proportional to 378,517.27, 522,354.30 and 206,435.51 is: 284,881.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,517.27 : 522,354.30 = 206,435.51 : x
  2. Step 2: Convert to fraction form
    378,517.27/522,354.30 = 206,435.51/x
  3. Step 3: Cross multiply
    378,517.27x = 522,354.30 × 206,435.51
  4. Step 4: Simplify right side
    378,517.27x = 107,832,476,321.19
  5. Step 5: Solve for x
    x = 107,832,476,321.19/378,517.27
  6. Step 6: Final answer
    x = 284,881.26

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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.