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Finding the Fourth Proportional to 699,874.38, 965,857.23 and 393,970.50

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Solution

The fourth proportional to 699,874.38, 965,857.23 and 393,970.50 is: 543,696.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,874.38 : 965,857.23 = 393,970.50 : x
  2. Step 2: Convert to fraction form
    699,874.38/965,857.23 = 393,970.50/x
  3. Step 3: Cross multiply
    699,874.38x = 965,857.23 × 393,970.50
  4. Step 4: Simplify right side
    699,874.38x = 380,519,255,831.72
  5. Step 5: Solve for x
    x = 380,519,255,831.72/699,874.38
  6. Step 6: Final answer
    x = 543,696.51

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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.