Home / 809,189.80-1,213,784.70-276,728.20

Finding the Fourth Proportional to 809,189.80, 1,213,784.70 and 276,728.20

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Solution

The fourth proportional to 809,189.80, 1,213,784.70 and 276,728.20 is: 415,092.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,189.80 : 1,213,784.70 = 276,728.20 : x
  2. Step 2: Convert to fraction form
    809,189.80/1,213,784.70 = 276,728.20/x
  3. Step 3: Cross multiply
    809,189.80x = 1,213,784.70 × 276,728.20
  4. Step 4: Simplify right side
    809,189.80x = 335,888,455,218.54
  5. Step 5: Solve for x
    x = 335,888,455,218.54/809,189.80
  6. Step 6: Final answer
    x = 415,092.30

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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.