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Finding the Fourth Proportional to 699,894.60, 965,843.64 and 393,970.32

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Solution

The fourth proportional to 699,894.60, 965,843.64 and 393,970.32 is: 543,672.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,894.60 : 965,843.64 = 393,970.32 : x
  2. Step 2: Convert to fraction form
    699,894.60/965,843.64 = 393,970.32/x
  3. Step 3: Cross multiply
    699,894.60x = 965,843.64 × 393,970.32
  4. Step 4: Simplify right side
    699,894.60x = 380,513,727,920.77
  5. Step 5: Solve for x
    x = 380,513,727,920.77/699,894.60
  6. Step 6: Final answer
    x = 543,672.90

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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.