Home / 1,212.30-1,819.17-481.68

Finding the Fourth Proportional to 1,212.30, 1,819.17 and 481.68

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Solution

The fourth proportional to 1,212.30, 1,819.17 and 481.68 is: 722.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.30 : 1,819.17 = 481.68 : x
  2. Step 2: Convert to fraction form
    1,212.30/1,819.17 = 481.68/x
  3. Step 3: Cross multiply
    1,212.30x = 1,819.17 × 481.68
  4. Step 4: Simplify right side
    1,212.30x = 876,257.81
  5. Step 5: Solve for x
    x = 876,257.81/1,212.30
  6. Step 6: Final answer
    x = 722.81

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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.