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Finding the Fourth Proportional to 647,993.18, 893,212.31 and 443,690.80

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Solution

The fourth proportional to 647,993.18, 893,212.31 and 443,690.80 is: 611,596.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,993.18 : 893,212.31 = 443,690.80 : x
  2. Step 2: Convert to fraction form
    647,993.18/893,212.31 = 443,690.80/x
  3. Step 3: Cross multiply
    647,993.18x = 893,212.31 × 443,690.80
  4. Step 4: Simplify right side
    647,993.18x = 396,310,083,269.94
  5. Step 5: Solve for x
    x = 396,310,083,269.94/647,993.18
  6. Step 6: Final answer
    x = 611,596.07

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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.