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Finding the Fourth Proportional to 1,912,957.56, 2,639,849.54 and 1,053,597.78

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Solution

The fourth proportional to 1,912,957.56, 2,639,849.54 and 1,053,597.78 is: 1,453,947.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912,957.56 : 2,639,849.54 = 1,053,597.78 : x
  2. Step 2: Convert to fraction form
    1,912,957.56/2,639,849.54 = 1,053,597.78/x
  3. Step 3: Cross multiply
    1,912,957.56x = 2,639,849.54 × 1,053,597.78
  4. Step 4: Simplify right side
    1,912,957.56x = 2,781,339,609,610.03
  5. Step 5: Solve for x
    x = 2,781,339,609,610.03/1,912,957.56
  6. Step 6: Final answer
    x = 1,453,947.37

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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.