Home / 1,581.27-2,371.22-485.39

Finding the Fourth Proportional to 1,581.27, 2,371.22 and 485.39

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Solution

The fourth proportional to 1,581.27, 2,371.22 and 485.39 is: 727.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.27 : 2,371.22 = 485.39 : x
  2. Step 2: Convert to fraction form
    1,581.27/2,371.22 = 485.39/x
  3. Step 3: Cross multiply
    1,581.27x = 2,371.22 × 485.39
  4. Step 4: Simplify right side
    1,581.27x = 1,150,974.53
  5. Step 5: Solve for x
    x = 1,150,974.53/1,581.27
  6. Step 6: Final answer
    x = 727.88

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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.