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Finding the Fourth Proportional to 699,813.69, 965,773.63 and 393,909.83

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Solution

The fourth proportional to 699,813.69, 965,773.63 and 393,909.83 is: 543,612.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,813.69 : 965,773.63 = 393,909.83 : x
  2. Step 2: Convert to fraction form
    699,813.69/965,773.63 = 393,909.83/x
  3. Step 3: Cross multiply
    699,813.69x = 965,773.63 × 393,909.83
  4. Step 4: Simplify right side
    699,813.69x = 380,427,726,411.78
  5. Step 5: Solve for x
    x = 380,427,726,411.78/699,813.69
  6. Step 6: Final answer
    x = 543,612.87

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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.