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Finding the Fourth Proportional to 721,103.85, 995,093.30 and 394,411.61

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Solution

The fourth proportional to 721,103.85, 995,093.30 and 394,411.61 is: 544,271.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,103.85 : 995,093.30 = 394,411.61 : x
  2. Step 2: Convert to fraction form
    721,103.85/995,093.30 = 394,411.61/x
  3. Step 3: Cross multiply
    721,103.85x = 995,093.30 × 394,411.61
  4. Step 4: Simplify right side
    721,103.85x = 392,476,354,026.98
  5. Step 5: Solve for x
    x = 392,476,354,026.98/721,103.85
  6. Step 6: Final answer
    x = 544,271.61

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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.