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Finding the Fourth Proportional to 641,339.97, 885,067.52 and 354,886.71

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Solution

The fourth proportional to 641,339.97, 885,067.52 and 354,886.71 is: 489,753.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,339.97 : 885,067.52 = 354,886.71 : x
  2. Step 2: Convert to fraction form
    641,339.97/885,067.52 = 354,886.71/x
  3. Step 3: Cross multiply
    641,339.97x = 885,067.52 × 354,886.71
  4. Step 4: Simplify right side
    641,339.97x = 314,098,700,300.66
  5. Step 5: Solve for x
    x = 314,098,700,300.66/641,339.97
  6. Step 6: Final answer
    x = 489,753.82

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1.5x scale

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.