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Finding the Fourth Proportional to 279,568.70, 419,353.05 and 69,206.64

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Solution

The fourth proportional to 279,568.70, 419,353.05 and 69,206.64 is: 103,809.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,568.70 : 419,353.05 = 69,206.64 : x
  2. Step 2: Convert to fraction form
    279,568.70/419,353.05 = 69,206.64/x
  3. Step 3: Cross multiply
    279,568.70x = 419,353.05 × 69,206.64
  4. Step 4: Simplify right side
    279,568.70x = 29,022,015,564.25
  5. Step 5: Solve for x
    x = 29,022,015,564.25/279,568.70
  6. Step 6: Final answer
    x = 103,809.96

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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.