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Finding the Fourth Proportional to 836,816, 1,255,776.96 and 393,618.56

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Solution

The fourth proportional to 836,816, 1,255,776.96 and 393,618.56 is: 590,687.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    836,816 : 1,255,776.96 = 393,618.56 : x
  2. Step 2: Convert to fraction form
    836,816/1,255,776.96 = 393,618.56/x
  3. Step 3: Cross multiply
    836,816x = 1,255,776.96 × 393,618.56
  4. Step 4: Simplify right side
    836,816x = 494,297,118,676.38
  5. Step 5: Solve for x
    x = 494,297,118,676.38/836,816
  6. Step 6: Final answer
    x = 590,687.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.