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Finding the Fourth Proportional to 3,947,469.21, 5,916,432.51 and 1,922,679

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Solution

The fourth proportional to 3,947,469.21, 5,916,432.51 and 1,922,679 is: 2,881,694.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947,469.21 : 5,916,432.51 = 1,922,679 : x
  2. Step 2: Convert to fraction form
    3,947,469.21/5,916,432.51 = 1,922,679/x
  3. Step 3: Cross multiply
    3,947,469.21x = 5,916,432.51 × 1,922,679
  4. Step 4: Simplify right side
    3,947,469.21x = 11,375,400,541,894.29
  5. Step 5: Solve for x
    x = 11,375,400,541,894.29/3,947,469.21
  6. Step 6: Final answer
    x = 2,881,694.56

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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.