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Finding the Fourth Proportional to 279,776.57, 419,313.71 and 220,377.65

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Solution

The fourth proportional to 279,776.57, 419,313.71 and 220,377.65 is: 330,289.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,776.57 : 419,313.71 = 220,377.65 : x
  2. Step 2: Convert to fraction form
    279,776.57/419,313.71 = 220,377.65/x
  3. Step 3: Cross multiply
    279,776.57x = 419,313.71 × 220,377.65
  4. Step 4: Simplify right side
    279,776.57x = 92,407,368,476.96
  5. Step 5: Solve for x
    x = 92,407,368,476.96/279,776.57
  6. Step 6: Final answer
    x = 330,289.88

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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.