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Finding the Fourth Proportional to 665,121.60, 997,520.40 and 191,757.60

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Solution

The fourth proportional to 665,121.60, 997,520.40 and 191,757.60 is: 287,589.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,121.60 : 997,520.40 = 191,757.60 : x
  2. Step 2: Convert to fraction form
    665,121.60/997,520.40 = 191,757.60/x
  3. Step 3: Cross multiply
    665,121.60x = 997,520.40 × 191,757.60
  4. Step 4: Simplify right side
    665,121.60x = 191,282,117,855.04
  5. Step 5: Solve for x
    x = 191,282,117,855.04/665,121.60
  6. Step 6: Final answer
    x = 287,589.69

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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.