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Finding the Fourth Proportional to 641,335.35, 885,031.11 and 354,855.43

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Solution

The fourth proportional to 641,335.35, 885,031.11 and 354,855.43 is: 489,694.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,335.35 : 885,031.11 = 354,855.43 : x
  2. Step 2: Convert to fraction form
    641,335.35/885,031.11 = 354,855.43/x
  3. Step 3: Cross multiply
    641,335.35x = 885,031.11 × 354,855.43
  4. Step 4: Simplify right side
    641,335.35x = 314,058,096,208.72
  5. Step 5: Solve for x
    x = 314,058,096,208.72/641,335.35
  6. Step 6: Final answer
    x = 489,694.04

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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.