Home / 1,221.75-1,833.30-1,212.57

Finding the Fourth Proportional to 1,221.75, 1,833.30 and 1,212.57

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Solution

The fourth proportional to 1,221.75, 1,833.30 and 1,212.57 is: 1,819.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.75 : 1,833.30 = 1,212.57 : x
  2. Step 2: Convert to fraction form
    1,221.75/1,833.30 = 1,212.57/x
  3. Step 3: Cross multiply
    1,221.75x = 1,833.30 × 1,212.57
  4. Step 4: Simplify right side
    1,221.75x = 2,223,004.58
  5. Step 5: Solve for x
    x = 2,223,004.58/1,221.75
  6. Step 6: Final answer
    x = 1,819.52

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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.