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Finding the Fourth Proportional to 2,847,978.06, 3,932,112.42 and 1,686,797.70

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Solution

The fourth proportional to 2,847,978.06, 3,932,112.42 and 1,686,797.70 is: 2,328,907.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847,978.06 : 3,932,112.42 = 1,686,797.70 : x
  2. Step 2: Convert to fraction form
    2,847,978.06/3,932,112.42 = 1,686,797.70/x
  3. Step 3: Cross multiply
    2,847,978.06x = 3,932,112.42 × 1,686,797.70
  4. Step 4: Simplify right side
    2,847,978.06x = 6,632,678,186,197.43
  5. Step 5: Solve for x
    x = 6,632,678,186,197.43/2,847,978.06
  6. Step 6: Final answer
    x = 2,328,907.75

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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.