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Finding the Fourth Proportional to 911,694.80, 1,367,559.81 and 280,608

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Solution

The fourth proportional to 911,694.80, 1,367,559.81 and 280,608 is: 420,917.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,694.80 : 1,367,559.81 = 280,608 : x
  2. Step 2: Convert to fraction form
    911,694.80/1,367,559.81 = 280,608/x
  3. Step 3: Cross multiply
    911,694.80x = 1,367,559.81 × 280,608
  4. Step 4: Simplify right side
    911,694.80x = 383,748,223,164.48
  5. Step 5: Solve for x
    x = 383,748,223,164.48/911,694.80
  6. Step 6: Final answer
    x = 420,917.42

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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.