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Finding the Fourth Proportional to 1,396,922.96, 1,927,760.31 and 816,179.09

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Solution

The fourth proportional to 1,396,922.96, 1,927,760.31 and 816,179.09 is: 1,126,331.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396,922.96 : 1,927,760.31 = 816,179.09 : x
  2. Step 2: Convert to fraction form
    1,396,922.96/1,927,760.31 = 816,179.09/x
  3. Step 3: Cross multiply
    1,396,922.96x = 1,927,760.31 × 816,179.09
  4. Step 4: Simplify right side
    1,396,922.96x = 1,573,397,645,915.12
  5. Step 5: Solve for x
    x = 1,573,397,645,915.12/1,396,922.96
  6. Step 6: Final answer
    x = 1,126,331.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.