Home / 2,759.26-4,138.96-811.53

Finding the Fourth Proportional to 2,759.26, 4,138.96 and 811.53

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Solution

The fourth proportional to 2,759.26, 4,138.96 and 811.53 is: 1,217.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,759.26 : 4,138.96 = 811.53 : x
  2. Step 2: Convert to fraction form
    2,759.26/4,138.96 = 811.53/x
  3. Step 3: Cross multiply
    2,759.26x = 4,138.96 × 811.53
  4. Step 4: Simplify right side
    2,759.26x = 3,358,890.21
  5. Step 5: Solve for x
    x = 3,358,890.21/2,759.26
  6. Step 6: Final answer
    x = 1,217.32

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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.