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Finding the Fourth Proportional to 809,778.80, 1,213,890.60 and 629,764.40

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Solution

The fourth proportional to 809,778.80, 1,213,890.60 and 629,764.40 is: 944,041.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,778.80 : 1,213,890.60 = 629,764.40 : x
  2. Step 2: Convert to fraction form
    809,778.80/1,213,890.60 = 629,764.40/x
  3. Step 3: Cross multiply
    809,778.80x = 1,213,890.60 × 629,764.40
  4. Step 4: Simplify right side
    809,778.80x = 764,465,085,374.64
  5. Step 5: Solve for x
    x = 764,465,085,374.64/809,778.80
  6. Step 6: Final answer
    x = 944,041.86

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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.