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Finding the Fourth Proportional to 806,537.80, 1,209,806.70 and 657,238.60

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Solution

The fourth proportional to 806,537.80, 1,209,806.70 and 657,238.60 is: 985,857.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,537.80 : 1,209,806.70 = 657,238.60 : x
  2. Step 2: Convert to fraction form
    806,537.80/1,209,806.70 = 657,238.60/x
  3. Step 3: Cross multiply
    806,537.80x = 1,209,806.70 × 657,238.60
  4. Step 4: Simplify right side
    806,537.80x = 795,131,661,778.62
  5. Step 5: Solve for x
    x = 795,131,661,778.62/806,537.80
  6. Step 6: Final answer
    x = 985,857.90

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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.