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Finding the Fourth Proportional to 1,581,154.88, 2,181,978.12 and 855,983.44

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Solution

The fourth proportional to 1,581,154.88, 2,181,978.12 and 855,983.44 is: 1,181,248.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581,154.88 : 2,181,978.12 = 855,983.44 : x
  2. Step 2: Convert to fraction form
    1,581,154.88/2,181,978.12 = 855,983.44/x
  3. Step 3: Cross multiply
    1,581,154.88x = 2,181,978.12 × 855,983.44
  4. Step 4: Simplify right side
    1,581,154.88x = 1,867,737,137,162.33
  5. Step 5: Solve for x
    x = 1,867,737,137,162.33/1,581,154.88
  6. Step 6: Final answer
    x = 1,181,248.69

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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.