Home / 1,380,139.21-1,904,571.57-768,290.86

Finding the Fourth Proportional to 1,380,139.21, 1,904,571.57 and 768,290.86

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Solution

The fourth proportional to 1,380,139.21, 1,904,571.57 and 768,290.86 is: 1,060,229.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,139.21 : 1,904,571.57 = 768,290.86 : x
  2. Step 2: Convert to fraction form
    1,380,139.21/1,904,571.57 = 768,290.86/x
  3. Step 3: Cross multiply
    1,380,139.21x = 1,904,571.57 × 768,290.86
  4. Step 4: Simplify right side
    1,380,139.21x = 1,463,264,929,446.85
  5. Step 5: Solve for x
    x = 1,463,264,929,446.85/1,380,139.21
  6. Step 6: Final answer
    x = 1,060,229.95

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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.