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Finding the Fourth Proportional to 624,681.96, 861,709.32 and 395,168.64

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Solution

The fourth proportional to 624,681.96, 861,709.32 and 395,168.64 is: 545,110.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,681.96 : 861,709.32 = 395,168.64 : x
  2. Step 2: Convert to fraction form
    624,681.96/861,709.32 = 395,168.64/x
  3. Step 3: Cross multiply
    624,681.96x = 861,709.32 × 395,168.64
  4. Step 4: Simplify right side
    624,681.96x = 340,520,500,059.73
  5. Step 5: Solve for x
    x = 340,520,500,059.73/624,681.96
  6. Step 6: Final answer
    x = 545,110.19

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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.