Home / 2,620.22-3,931.13-1,321.25

Finding the Fourth Proportional to 2,620.22, 3,931.13 and 1,321.25

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Solution

The fourth proportional to 2,620.22, 3,931.13 and 1,321.25 is: 1,982.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.22 : 3,931.13 = 1,321.25 : x
  2. Step 2: Convert to fraction form
    2,620.22/3,931.13 = 1,321.25/x
  3. Step 3: Cross multiply
    2,620.22x = 3,931.13 × 1,321.25
  4. Step 4: Simplify right side
    2,620.22x = 5,193,989.16
  5. Step 5: Solve for x
    x = 5,193,989.16/2,620.22
  6. Step 6: Final answer
    x = 1,982.28

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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.