Home / 1,442,589.88-1,990,773.84-789,221.20

Finding the Fourth Proportional to 1,442,589.88, 1,990,773.84 and 789,221.20

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Solution

The fourth proportional to 1,442,589.88, 1,990,773.84 and 789,221.20 is: 1,089,125.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442,589.88 : 1,990,773.84 = 789,221.20 : x
  2. Step 2: Convert to fraction form
    1,442,589.88/1,990,773.84 = 789,221.20/x
  3. Step 3: Cross multiply
    1,442,589.88x = 1,990,773.84 × 789,221.20
  4. Step 4: Simplify right side
    1,442,589.88x = 1,571,160,918,933.41
  5. Step 5: Solve for x
    x = 1,571,160,918,933.41/1,442,589.88
  6. Step 6: Final answer
    x = 1,089,125.15

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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.