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Finding the Fourth Proportional to 929,793.90, 1,394,690.85 and 811,695.90

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Solution

The fourth proportional to 929,793.90, 1,394,690.85 and 811,695.90 is: 1,217,543.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    929,793.90 : 1,394,690.85 = 811,695.90 : x
  2. Step 2: Convert to fraction form
    929,793.90/1,394,690.85 = 811,695.90/x
  3. Step 3: Cross multiply
    929,793.90x = 1,394,690.85 × 811,695.90
  4. Step 4: Simplify right side
    929,793.90x = 1,132,064,844,712.52
  5. Step 5: Solve for x
    x = 1,132,064,844,712.52/929,793.90
  6. Step 6: Final answer
    x = 1,217,543.85

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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.