Home / 2,720.13-4,078.37-1,422.51

Finding the Fourth Proportional to 2,720.13, 4,078.37 and 1,422.51

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Solution

The fourth proportional to 2,720.13, 4,078.37 and 1,422.51 is: 2,132.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.13 : 4,078.37 = 1,422.51 : x
  2. Step 2: Convert to fraction form
    2,720.13/4,078.37 = 1,422.51/x
  3. Step 3: Cross multiply
    2,720.13x = 4,078.37 × 1,422.51
  4. Step 4: Simplify right side
    2,720.13x = 5,801,515.00
  5. Step 5: Solve for x
    x = 5,801,515.00/2,720.13
  6. Step 6: Final answer
    x = 2,132.81

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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.