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Finding the Fourth Proportional to 624,714.20, 861,753.66 and 395,200.28

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Solution

The fourth proportional to 624,714.20, 861,753.66 and 395,200.28 is: 545,153.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,714.20 : 861,753.66 = 395,200.28 : x
  2. Step 2: Convert to fraction form
    624,714.20/861,753.66 = 395,200.28/x
  3. Step 3: Cross multiply
    624,714.20x = 861,753.66 × 395,200.28
  4. Step 4: Simplify right side
    624,714.20x = 340,565,287,723.03
  5. Step 5: Solve for x
    x = 340,565,287,723.03/624,714.20
  6. Step 6: Final answer
    x = 545,153.75

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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.