Home / 809,322.20-1,213,983.30-431,408.60

Finding the Fourth Proportional to 809,322.20, 1,213,983.30 and 431,408.60

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Solution

The fourth proportional to 809,322.20, 1,213,983.30 and 431,408.60 is: 647,112.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,322.20 : 1,213,983.30 = 431,408.60 : x
  2. Step 2: Convert to fraction form
    809,322.20/1,213,983.30 = 431,408.60/x
  3. Step 3: Cross multiply
    809,322.20x = 1,213,983.30 × 431,408.60
  4. Step 4: Simplify right side
    809,322.20x = 523,722,835,876.38
  5. Step 5: Solve for x
    x = 523,722,835,876.38/809,322.20
  6. Step 6: Final answer
    x = 647,112.90

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1.5x scale

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.