Home / 809,316.20-1,213,974.30-431,402.60

Finding the Fourth Proportional to 809,316.20, 1,213,974.30 and 431,402.60

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Solution

The fourth proportional to 809,316.20, 1,213,974.30 and 431,402.60 is: 647,103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,316.20 : 1,213,974.30 = 431,402.60 : x
  2. Step 2: Convert to fraction form
    809,316.20/1,213,974.30 = 431,402.60/x
  3. Step 3: Cross multiply
    809,316.20x = 1,213,974.30 × 431,402.60
  4. Step 4: Simplify right side
    809,316.20x = 523,711,669,353.18
  5. Step 5: Solve for x
    x = 523,711,669,353.18/809,316.20
  6. Step 6: Final answer
    x = 647,103.90

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Similar ratio
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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.