Home / 809,338.20-1,214,007.30-431,424.60

Finding the Fourth Proportional to 809,338.20, 1,214,007.30 and 431,424.60

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Solution

The fourth proportional to 809,338.20, 1,214,007.30 and 431,424.60 is: 647,136.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,338.20 : 1,214,007.30 = 431,424.60 : x
  2. Step 2: Convert to fraction form
    809,338.20/1,214,007.30 = 431,424.60/x
  3. Step 3: Cross multiply
    809,338.20x = 1,214,007.30 × 431,424.60
  4. Step 4: Simplify right side
    809,338.20x = 523,752,613,799.58
  5. Step 5: Solve for x
    x = 523,752,613,799.58/809,338.20
  6. Step 6: Final answer
    x = 647,136.90

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Double scale
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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.