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Finding the Fourth Proportional to 1,389,761.22, 1,917,597.83 and 873,215.88

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Solution

The fourth proportional to 1,389,761.22, 1,917,597.83 and 873,215.88 is: 1,204,866.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,761.22 : 1,917,597.83 = 873,215.88 : x
  2. Step 2: Convert to fraction form
    1,389,761.22/1,917,597.83 = 873,215.88/x
  3. Step 3: Cross multiply
    1,389,761.22x = 1,917,597.83 × 873,215.88
  4. Step 4: Simplify right side
    1,389,761.22x = 1,674,476,865,052.47
  5. Step 5: Solve for x
    x = 1,674,476,865,052.47/1,389,761.22
  6. Step 6: Final answer
    x = 1,204,866.59

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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.