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Finding the Fourth Proportional to 278,939.72, 384,935.37 and 151,616

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Solution

The fourth proportional to 278,939.72, 384,935.37 and 151,616 is: 209,229.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,939.72 : 384,935.37 = 151,616 : x
  2. Step 2: Convert to fraction form
    278,939.72/384,935.37 = 151,616/x
  3. Step 3: Cross multiply
    278,939.72x = 384,935.37 × 151,616
  4. Step 4: Simplify right side
    278,939.72x = 58,362,361,057.92
  5. Step 5: Solve for x
    x = 58,362,361,057.92/278,939.72
  6. Step 6: Final answer
    x = 209,229.30

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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.