Home / 2,621.44-3,931.92-1,321.88

Finding the Fourth Proportional to 2,621.44, 3,931.92 and 1,321.88

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Solution

The fourth proportional to 2,621.44, 3,931.92 and 1,321.88 is: 1,982.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621.44 : 3,931.92 = 1,321.88 : x
  2. Step 2: Convert to fraction form
    2,621.44/3,931.92 = 1,321.88/x
  3. Step 3: Cross multiply
    2,621.44x = 3,931.92 × 1,321.88
  4. Step 4: Simplify right side
    2,621.44x = 5,197,526.41
  5. Step 5: Solve for x
    x = 5,197,526.41/2,621.44
  6. Step 6: Final answer
    x = 1,982.70

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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.