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Finding the Fourth Proportional to 279,943.20, 419,914.80 and 201,211.20

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Solution

The fourth proportional to 279,943.20, 419,914.80 and 201,211.20 is: 301,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,943.20 : 419,914.80 = 201,211.20 : x
  2. Step 2: Convert to fraction form
    279,943.20/419,914.80 = 201,211.20/x
  3. Step 3: Cross multiply
    279,943.20x = 419,914.80 × 201,211.20
  4. Step 4: Simplify right side
    279,943.20x = 84,491,560,805.76
  5. Step 5: Solve for x
    x = 84,491,560,805.76/279,943.20
  6. Step 6: Final answer
    x = 301,816.80

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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.