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Finding the Fourth Proportional to 1,278,793.72, 1,764,609.78 and 705,797.20

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Solution

The fourth proportional to 1,278,793.72, 1,764,609.78 and 705,797.20 is: 973,930.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,793.72 : 1,764,609.78 = 705,797.20 : x
  2. Step 2: Convert to fraction form
    1,278,793.72/1,764,609.78 = 705,797.20/x
  3. Step 3: Cross multiply
    1,278,793.72x = 1,764,609.78 × 705,797.20
  4. Step 4: Simplify right side
    1,278,793.72x = 1,245,456,641,816.62
  5. Step 5: Solve for x
    x = 1,245,456,641,816.62/1,278,793.72
  6. Step 6: Final answer
    x = 973,930.84

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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.