Home / 1,291,078.32-1,782,063.20-861,357.36

Finding the Fourth Proportional to 1,291,078.32, 1,782,063.20 and 861,357.36

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Solution

The fourth proportional to 1,291,078.32, 1,782,063.20 and 861,357.36 is: 1,188,923.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,078.32 : 1,782,063.20 = 861,357.36 : x
  2. Step 2: Convert to fraction form
    1,291,078.32/1,782,063.20 = 861,357.36/x
  3. Step 3: Cross multiply
    1,291,078.32x = 1,782,063.20 × 861,357.36
  4. Step 4: Simplify right side
    1,291,078.32x = 1,534,993,253,305.15
  5. Step 5: Solve for x
    x = 1,534,993,253,305.15/1,291,078.32
  6. Step 6: Final answer
    x = 1,188,923.42

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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.