Home / 1,427.26-2,140.85-1,081.25

Finding the Fourth Proportional to 1,427.26, 2,140.85 and 1,081.25

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Solution

The fourth proportional to 1,427.26, 2,140.85 and 1,081.25 is: 1,621.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.26 : 2,140.85 = 1,081.25 : x
  2. Step 2: Convert to fraction form
    1,427.26/2,140.85 = 1,081.25/x
  3. Step 3: Cross multiply
    1,427.26x = 2,140.85 × 1,081.25
  4. Step 4: Simplify right side
    1,427.26x = 2,314,794.06
  5. Step 5: Solve for x
    x = 2,314,794.06/1,427.26
  6. Step 6: Final answer
    x = 1,621.84

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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.