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Finding the Fourth Proportional to 3,879,943.86, 5,809,978.56 and 3,238,653.08

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Solution

The fourth proportional to 3,879,943.86, 5,809,978.56 and 3,238,653.08 is: 4,849,684.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879,943.86 : 5,809,978.56 = 3,238,653.08 : x
  2. Step 2: Convert to fraction form
    3,879,943.86/5,809,978.56 = 3,238,653.08/x
  3. Step 3: Cross multiply
    3,879,943.86x = 5,809,978.56 × 3,238,653.08
  4. Step 4: Simplify right side
    3,879,943.86x = 18,816,504,958,077.96
  5. Step 5: Solve for x
    x = 18,816,504,958,077.96/3,879,943.86
  6. Step 6: Final answer
    x = 4,849,684.85

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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.