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Finding the Fourth Proportional to 961,809.80, 1,327,059.06 and 621,869

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Solution

The fourth proportional to 961,809.80, 1,327,059.06 and 621,869 is: 858,025.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    961,809.80 : 1,327,059.06 = 621,869 : x
  2. Step 2: Convert to fraction form
    961,809.80/1,327,059.06 = 621,869/x
  3. Step 3: Cross multiply
    961,809.80x = 1,327,059.06 × 621,869
  4. Step 4: Simplify right side
    961,809.80x = 825,256,890,583.14
  5. Step 5: Solve for x
    x = 825,256,890,583.14/961,809.80
  6. Step 6: Final answer
    x = 858,025.04

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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.