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Finding the Fourth Proportional to 865,654.30, 1,298,481.45 and 853,212.70

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Solution

The fourth proportional to 865,654.30, 1,298,481.45 and 853,212.70 is: 1,279,819.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,654.30 : 1,298,481.45 = 853,212.70 : x
  2. Step 2: Convert to fraction form
    865,654.30/1,298,481.45 = 853,212.70/x
  3. Step 3: Cross multiply
    865,654.30x = 1,298,481.45 × 853,212.70
  4. Step 4: Simplify right side
    865,654.30x = 1,107,880,863,854.41
  5. Step 5: Solve for x
    x = 1,107,880,863,854.41/865,654.30
  6. Step 6: Final answer
    x = 1,279,819.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.