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Finding the Fourth Proportional to 465,893.45, 698,855.82 and 128,905.91

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Solution

The fourth proportional to 465,893.45, 698,855.82 and 128,905.91 is: 193,363.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,893.45 : 698,855.82 = 128,905.91 : x
  2. Step 2: Convert to fraction form
    465,893.45/698,855.82 = 128,905.91/x
  3. Step 3: Cross multiply
    465,893.45x = 698,855.82 × 128,905.91
  4. Step 4: Simplify right side
    465,893.45x = 90,086,647,183.04
  5. Step 5: Solve for x
    x = 90,086,647,183.04/465,893.45
  6. Step 6: Final answer
    x = 193,363.20

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1.5x scale

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.