Home / 1,327,820.20-1,990,709.42-687,437.44

Finding the Fourth Proportional to 1,327,820.20, 1,990,709.42 and 687,437.44

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Solution

The fourth proportional to 1,327,820.20, 1,990,709.42 and 687,437.44 is: 1,030,627.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327,820.20 : 1,990,709.42 = 687,437.44 : x
  2. Step 2: Convert to fraction form
    1,327,820.20/1,990,709.42 = 687,437.44/x
  3. Step 3: Cross multiply
    1,327,820.20x = 1,990,709.42 × 687,437.44
  4. Step 4: Simplify right side
    1,327,820.20x = 1,368,488,187,468.68
  5. Step 5: Solve for x
    x = 1,368,488,187,468.68/1,327,820.20
  6. Step 6: Final answer
    x = 1,030,627.63

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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.