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Finding the Fourth Proportional to 398,786.56, 550,385.76 and 247,932.16

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Solution

The fourth proportional to 398,786.56, 550,385.76 and 247,932.16 is: 342,183.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,786.56 : 550,385.76 = 247,932.16 : x
  2. Step 2: Convert to fraction form
    398,786.56/550,385.76 = 247,932.16/x
  3. Step 3: Cross multiply
    398,786.56x = 550,385.76 × 247,932.16
  4. Step 4: Simplify right side
    398,786.56x = 136,458,330,310.04
  5. Step 5: Solve for x
    x = 136,458,330,310.04/398,786.56
  6. Step 6: Final answer
    x = 342,183.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.