Home / 2,620.24-3,931.92-1,321.84

Finding the Fourth Proportional to 2,620.24, 3,931.92 and 1,321.84

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Solution

The fourth proportional to 2,620.24, 3,931.92 and 1,321.84 is: 1,983.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.24 : 3,931.92 = 1,321.84 : x
  2. Step 2: Convert to fraction form
    2,620.24/3,931.92 = 1,321.84/x
  3. Step 3: Cross multiply
    2,620.24x = 3,931.92 × 1,321.84
  4. Step 4: Simplify right side
    2,620.24x = 5,197,369.13
  5. Step 5: Solve for x
    x = 5,197,369.13/2,620.24
  6. Step 6: Final answer
    x = 1,983.55

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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.