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Finding the Fourth Proportional to 378,426.78, 522,208.26 and 208,647.54

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Solution

The fourth proportional to 378,426.78, 522,208.26 and 208,647.54 is: 287,922.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,426.78 : 522,208.26 = 208,647.54 : x
  2. Step 2: Convert to fraction form
    378,426.78/522,208.26 = 208,647.54/x
  3. Step 3: Cross multiply
    378,426.78x = 522,208.26 × 208,647.54
  4. Step 4: Simplify right side
    378,426.78x = 108,957,468,816.68
  5. Step 5: Solve for x
    x = 108,957,468,816.68/378,426.78
  6. Step 6: Final answer
    x = 287,922.19

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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.