Home / 2,091.26-3,143.39-1,316.25

Finding the Fourth Proportional to 2,091.26, 3,143.39 and 1,316.25

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Solution

The fourth proportional to 2,091.26, 3,143.39 and 1,316.25 is: 1,978.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.26 : 3,143.39 = 1,316.25 : x
  2. Step 2: Convert to fraction form
    2,091.26/3,143.39 = 1,316.25/x
  3. Step 3: Cross multiply
    2,091.26x = 3,143.39 × 1,316.25
  4. Step 4: Simplify right side
    2,091.26x = 4,137,480.51
  5. Step 5: Solve for x
    x = 4,137,480.51/2,091.26
  6. Step 6: Final answer
    x = 1,978.47

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1.5x scale

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.