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Finding the Fourth Proportional to 399,906.72, 599,859 and 133,667.28

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Solution

The fourth proportional to 399,906.72, 599,859 and 133,667.28 is: 200,500.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,906.72 : 599,859 = 133,667.28 : x
  2. Step 2: Convert to fraction form
    399,906.72/599,859 = 133,667.28/x
  3. Step 3: Cross multiply
    399,906.72x = 599,859 × 133,667.28
  4. Step 4: Simplify right side
    399,906.72x = 80,181,520,913.52
  5. Step 5: Solve for x
    x = 80,181,520,913.52/399,906.72
  6. Step 6: Final answer
    x = 200,500.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.