Home / 839,906.70-1,259,860.05-485,612.70

Finding the Fourth Proportional to 839,906.70, 1,259,860.05 and 485,612.70

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Solution

The fourth proportional to 839,906.70, 1,259,860.05 and 485,612.70 is: 728,419.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,906.70 : 1,259,860.05 = 485,612.70 : x
  2. Step 2: Convert to fraction form
    839,906.70/1,259,860.05 = 485,612.70/x
  3. Step 3: Cross multiply
    839,906.70x = 1,259,860.05 × 485,612.70
  4. Step 4: Simplify right side
    839,906.70x = 611,804,040,502.64
  5. Step 5: Solve for x
    x = 611,804,040,502.64/839,906.70
  6. Step 6: Final answer
    x = 728,419.05

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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.