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Finding the Fourth Proportional to 699,730.21, 965,587.72 and 393,819.33

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Solution

The fourth proportional to 699,730.21, 965,587.72 and 393,819.33 is: 543,448.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,730.21 : 965,587.72 = 393,819.33 : x
  2. Step 2: Convert to fraction form
    699,730.21/965,587.72 = 393,819.33/x
  3. Step 3: Cross multiply
    699,730.21x = 965,587.72 × 393,819.33
  4. Step 4: Simplify right side
    699,730.21x = 380,267,108,946.63
  5. Step 5: Solve for x
    x = 380,267,108,946.63/699,730.21
  6. Step 6: Final answer
    x = 543,448.18

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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.