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Finding the Fourth Proportional to 398,707.20, 550,195.20 and 247,800.96

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Solution

The fourth proportional to 398,707.20, 550,195.20 and 247,800.96 is: 341,952.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,707.20 : 550,195.20 = 247,800.96 : x
  2. Step 2: Convert to fraction form
    398,707.20/550,195.20 = 247,800.96/x
  3. Step 3: Cross multiply
    398,707.20x = 550,195.20 × 247,800.96
  4. Step 4: Simplify right side
    398,707.20x = 136,338,898,747.39
  5. Step 5: Solve for x
    x = 136,338,898,747.39/398,707.20
  6. Step 6: Final answer
    x = 341,952.44

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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.