Home / 1,287,766.80-1,933,205.40-1,278,435.60

Finding the Fourth Proportional to 1,287,766.80, 1,933,205.40 and 1,278,435.60

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Solution

The fourth proportional to 1,287,766.80, 1,933,205.40 and 1,278,435.60 is: 1,919,197.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,766.80 : 1,933,205.40 = 1,278,435.60 : x
  2. Step 2: Convert to fraction form
    1,287,766.80/1,933,205.40 = 1,278,435.60/x
  3. Step 3: Cross multiply
    1,287,766.80x = 1,933,205.40 × 1,278,435.60
  4. Step 4: Simplify right side
    1,287,766.80x = 2,471,478,605,472.24
  5. Step 5: Solve for x
    x = 2,471,478,605,472.24/1,287,766.80
  6. Step 6: Final answer
    x = 1,919,197.33

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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.