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Finding the Fourth Proportional to 665,115.15, 997,820.15 and 191,763.57

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Solution

The fourth proportional to 665,115.15, 997,820.15 and 191,763.57 is: 287,687.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,115.15 : 997,820.15 = 191,763.57 : x
  2. Step 2: Convert to fraction form
    665,115.15/997,820.15 = 191,763.57/x
  3. Step 3: Cross multiply
    665,115.15x = 997,820.15 × 191,763.57
  4. Step 4: Simplify right side
    665,115.15x = 191,345,553,223.12
  5. Step 5: Solve for x
    x = 191,345,553,223.12/665,115.15
  6. Step 6: Final answer
    x = 287,687.86

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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.