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Finding the Fourth Proportional to 625,078.57, 862,433.41 and 392,530.59

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Solution

The fourth proportional to 625,078.57, 862,433.41 and 392,530.59 is: 541,582.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,078.57 : 862,433.41 = 392,530.59 : x
  2. Step 2: Convert to fraction form
    625,078.57/862,433.41 = 392,530.59/x
  3. Step 3: Cross multiply
    625,078.57x = 862,433.41 × 392,530.59
  4. Step 4: Simplify right side
    625,078.57x = 338,531,495,263.01
  5. Step 5: Solve for x
    x = 338,531,495,263.01/625,078.57
  6. Step 6: Final answer
    x = 541,582.31

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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.