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Finding the Fourth Proportional to 331,300.80, 496,951.20 and 279,979.20

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Solution

The fourth proportional to 331,300.80, 496,951.20 and 279,979.20 is: 419,968.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,300.80 : 496,951.20 = 279,979.20 : x
  2. Step 2: Convert to fraction form
    331,300.80/496,951.20 = 279,979.20/x
  3. Step 3: Cross multiply
    331,300.80x = 496,951.20 × 279,979.20
  4. Step 4: Simplify right side
    331,300.80x = 139,135,999,415.04
  5. Step 5: Solve for x
    x = 139,135,999,415.04/331,300.80
  6. Step 6: Final answer
    x = 419,968.80

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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.