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Finding the Fourth Proportional to 611,920.92, 917,375.94 and 270,120.90

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Solution

The fourth proportional to 611,920.92, 917,375.94 and 270,120.90 is: 404,958.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,920.92 : 917,375.94 = 270,120.90 : x
  2. Step 2: Convert to fraction form
    611,920.92/917,375.94 = 270,120.90/x
  3. Step 3: Cross multiply
    611,920.92x = 917,375.94 × 270,120.90
  4. Step 4: Simplify right side
    611,920.92x = 247,802,414,551.15
  5. Step 5: Solve for x
    x = 247,802,414,551.15/611,920.92
  6. Step 6: Final answer
    x = 404,958.23

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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.