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Finding the Fourth Proportional to 621,693.52, 857,860.95 and 392,164.63

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Solution

The fourth proportional to 621,693.52, 857,860.95 and 392,164.63 is: 541,139.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,693.52 : 857,860.95 = 392,164.63 : x
  2. Step 2: Convert to fraction form
    621,693.52/857,860.95 = 392,164.63/x
  3. Step 3: Cross multiply
    621,693.52x = 857,860.95 × 392,164.63
  4. Step 4: Simplify right side
    621,693.52x = 336,422,722,048.20
  5. Step 5: Solve for x
    x = 336,422,722,048.20/621,693.52
  6. Step 6: Final answer
    x = 541,139.18

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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.