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Finding the Fourth Proportional to 386,791.18, 533,781.08 and 217,037.86

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Solution

The fourth proportional to 386,791.18, 533,781.08 and 217,037.86 is: 299,517.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,791.18 : 533,781.08 = 217,037.86 : x
  2. Step 2: Convert to fraction form
    386,791.18/533,781.08 = 217,037.86/x
  3. Step 3: Cross multiply
    386,791.18x = 533,781.08 × 217,037.86
  4. Step 4: Simplify right side
    386,791.18x = 115,850,703,311.69
  5. Step 5: Solve for x
    x = 115,850,703,311.69/386,791.18
  6. Step 6: Final answer
    x = 299,517.44

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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.