Home / 1,292,512.44-1,782,505.92-809,121.60

Finding the Fourth Proportional to 1,292,512.44, 1,782,505.92 and 809,121.60

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Solution

The fourth proportional to 1,292,512.44, 1,782,505.92 and 809,121.60 is: 1,115,860.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292,512.44 : 1,782,505.92 = 809,121.60 : x
  2. Step 2: Convert to fraction form
    1,292,512.44/1,782,505.92 = 809,121.60/x
  3. Step 3: Cross multiply
    1,292,512.44x = 1,782,505.92 × 809,121.60
  4. Step 4: Simplify right side
    1,292,512.44x = 1,442,264,041,999.87
  5. Step 5: Solve for x
    x = 1,442,264,041,999.87/1,292,512.44
  6. Step 6: Final answer
    x = 1,115,860.86

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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.