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Finding the Fourth Proportional to 644,194.96, 888,845.88 and 389,540.80

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Solution

The fourth proportional to 644,194.96, 888,845.88 and 389,540.80 is: 537,479.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,194.96 : 888,845.88 = 389,540.80 : x
  2. Step 2: Convert to fraction form
    644,194.96/888,845.88 = 389,540.80/x
  3. Step 3: Cross multiply
    644,194.96x = 888,845.88 × 389,540.80
  4. Step 4: Simplify right side
    644,194.96x = 346,241,735,171.90
  5. Step 5: Solve for x
    x = 346,241,735,171.90/644,194.96
  6. Step 6: Final answer
    x = 537,479.73

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1.5x scale

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.