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Finding the Fourth Proportional to 1,891,981.31, 2,836,284.12 and 693,623.84

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Solution

The fourth proportional to 1,891,981.31, 2,836,284.12 and 693,623.84 is: 1,039,816.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891,981.31 : 2,836,284.12 = 693,623.84 : x
  2. Step 2: Convert to fraction form
    1,891,981.31/2,836,284.12 = 693,623.84/x
  3. Step 3: Cross multiply
    1,891,981.31x = 2,836,284.12 × 693,623.84
  4. Step 4: Simplify right side
    1,891,981.31x = 1,967,314,268,464.00
  5. Step 5: Solve for x
    x = 1,967,314,268,464.00/1,891,981.31
  6. Step 6: Final answer
    x = 1,039,816.97

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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.