Home / 2,581.58-3,869.94-1,281.80

Finding the Fourth Proportional to 2,581.58, 3,869.94 and 1,281.80

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Solution

The fourth proportional to 2,581.58, 3,869.94 and 1,281.80 is: 1,921.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,581.58 : 3,869.94 = 1,281.80 : x
  2. Step 2: Convert to fraction form
    2,581.58/3,869.94 = 1,281.80/x
  3. Step 3: Cross multiply
    2,581.58x = 3,869.94 × 1,281.80
  4. Step 4: Simplify right side
    2,581.58x = 4,960,489.09
  5. Step 5: Solve for x
    x = 4,960,489.09/2,581.58
  6. Step 6: Final answer
    x = 1,921.49

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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.