Home / 1,891.26-2,611.59-1,272.06

Finding the Fourth Proportional to 1,891.26, 2,611.59 and 1,272.06

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Solution

The fourth proportional to 1,891.26, 2,611.59 and 1,272.06 is: 1,756.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.26 : 2,611.59 = 1,272.06 : x
  2. Step 2: Convert to fraction form
    1,891.26/2,611.59 = 1,272.06/x
  3. Step 3: Cross multiply
    1,891.26x = 2,611.59 × 1,272.06
  4. Step 4: Simplify right side
    1,891.26x = 3,322,099.18
  5. Step 5: Solve for x
    x = 3,322,099.18/1,891.26
  6. Step 6: Final answer
    x = 1,756.55

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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.