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Finding the Fourth Proportional to 279,800.28, 419,841.56 and 137,639.60

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Solution

The fourth proportional to 279,800.28, 419,841.56 and 137,639.60 is: 206,528.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,800.28 : 419,841.56 = 137,639.60 : x
  2. Step 2: Convert to fraction form
    279,800.28/419,841.56 = 137,639.60/x
  3. Step 3: Cross multiply
    279,800.28x = 419,841.56 × 137,639.60
  4. Step 4: Simplify right side
    279,800.28x = 57,786,824,381.78
  5. Step 5: Solve for x
    x = 57,786,824,381.78/279,800.28
  6. Step 6: Final answer
    x = 206,528.83

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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.