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Finding the Fourth Proportional to 1,276,815.06, 1,917,391.92 and 853,073.88

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Solution

The fourth proportional to 1,276,815.06, 1,917,391.92 and 853,073.88 is: 1,281,060.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276,815.06 : 1,917,391.92 = 853,073.88 : x
  2. Step 2: Convert to fraction form
    1,276,815.06/1,917,391.92 = 853,073.88/x
  3. Step 3: Cross multiply
    1,276,815.06x = 1,917,391.92 × 853,073.88
  4. Step 4: Simplify right side
    1,276,815.06x = 1,635,676,964,675.05
  5. Step 5: Solve for x
    x = 1,635,676,964,675.05/1,276,815.06
  6. Step 6: Final answer
    x = 1,281,060.21

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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.