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Finding the Fourth Proportional to 3,903,978.95, 5,387,435.24 and 2,161,481.22

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Solution

The fourth proportional to 3,903,978.95, 5,387,435.24 and 2,161,481.22 is: 2,982,813.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,903,978.95 : 5,387,435.24 = 2,161,481.22 : x
  2. Step 2: Convert to fraction form
    3,903,978.95/5,387,435.24 = 2,161,481.22/x
  3. Step 3: Cross multiply
    3,903,978.95x = 5,387,435.24 × 2,161,481.22
  4. Step 4: Simplify right side
    3,903,978.95x = 11,644,840,084,418.79
  5. Step 5: Solve for x
    x = 11,644,840,084,418.79/3,903,978.95
  6. Step 6: Final answer
    x = 2,982,813.24

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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.