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Finding the Fourth Proportional to 1,278,791.84, 1,764,469.31 and 734,822.54

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Solution

The fourth proportional to 1,278,791.84, 1,764,469.31 and 734,822.54 is: 1,013,903.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,791.84 : 1,764,469.31 = 734,822.54 : x
  2. Step 2: Convert to fraction form
    1,278,791.84/1,764,469.31 = 734,822.54/x
  3. Step 3: Cross multiply
    1,278,791.84x = 1,764,469.31 × 734,822.54
  4. Step 4: Simplify right side
    1,278,791.84x = 1,296,571,811,303.90
  5. Step 5: Solve for x
    x = 1,296,571,811,303.90/1,278,791.84
  6. Step 6: Final answer
    x = 1,013,903.73

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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.