Home / 2,629.32-3,943.82-780.44

Finding the Fourth Proportional to 2,629.32, 3,943.82 and 780.44

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Solution

The fourth proportional to 2,629.32, 3,943.82 and 780.44 is: 1,170.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,629.32 : 3,943.82 = 780.44 : x
  2. Step 2: Convert to fraction form
    2,629.32/3,943.82 = 780.44/x
  3. Step 3: Cross multiply
    2,629.32x = 3,943.82 × 780.44
  4. Step 4: Simplify right side
    2,629.32x = 3,077,914.88
  5. Step 5: Solve for x
    x = 3,077,914.88/2,629.32
  6. Step 6: Final answer
    x = 1,170.61

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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.