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Finding the Fourth Proportional to 278,940.96, 384,936.39 and 151,617.45

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Solution

The fourth proportional to 278,940.96, 384,936.39 and 151,617.45 is: 209,230.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,940.96 : 384,936.39 = 151,617.45 : x
  2. Step 2: Convert to fraction form
    278,940.96/384,936.39 = 151,617.45/x
  3. Step 3: Cross multiply
    278,940.96x = 384,936.39 × 151,617.45
  4. Step 4: Simplify right side
    278,940.96x = 58,363,073,864.01
  5. Step 5: Solve for x
    x = 58,363,073,864.01/278,940.96
  6. Step 6: Final answer
    x = 209,230.92

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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.