Home / 839,883.40-1,259,825.10-419,979.40

Finding the Fourth Proportional to 839,883.40, 1,259,825.10 and 419,979.40

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Solution

The fourth proportional to 839,883.40, 1,259,825.10 and 419,979.40 is: 629,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,883.40 : 1,259,825.10 = 419,979.40 : x
  2. Step 2: Convert to fraction form
    839,883.40/1,259,825.10 = 419,979.40/x
  3. Step 3: Cross multiply
    839,883.40x = 1,259,825.10 × 419,979.40
  4. Step 4: Simplify right side
    839,883.40x = 529,100,589,602.94
  5. Step 5: Solve for x
    x = 529,100,589,602.94/839,883.40
  6. Step 6: Final answer
    x = 629,969.10

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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.