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Finding the Fourth Proportional to 621,553.32, 857,433.06 and 392,394.60

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Solution

The fourth proportional to 621,553.32, 857,433.06 and 392,394.60 is: 541,308.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,553.32 : 857,433.06 = 392,394.60 : x
  2. Step 2: Convert to fraction form
    621,553.32/857,433.06 = 392,394.60/x
  3. Step 3: Cross multiply
    621,553.32x = 857,433.06 × 392,394.60
  4. Step 4: Simplify right side
    621,553.32x = 336,452,102,605.48
  5. Step 5: Solve for x
    x = 336,452,102,605.48/621,553.32
  6. Step 6: Final answer
    x = 541,308.51

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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.