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Finding the Fourth Proportional to 699,543.54, 965,349.09 and 393,636.92

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Solution

The fourth proportional to 699,543.54, 965,349.09 and 393,636.92 is: 543,207.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,543.54 : 965,349.09 = 393,636.92 : x
  2. Step 2: Convert to fraction form
    699,543.54/965,349.09 = 393,636.92/x
  3. Step 3: Cross multiply
    699,543.54x = 965,349.09 × 393,636.92
  4. Step 4: Simplify right side
    699,543.54x = 379,997,037,685.66
  5. Step 5: Solve for x
    x = 379,997,037,685.66/699,543.54
  6. Step 6: Final answer
    x = 543,207.13

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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.