Home / 1,220.73-1,829.25-489.69

Finding the Fourth Proportional to 1,220.73, 1,829.25 and 489.69

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Solution

The fourth proportional to 1,220.73, 1,829.25 and 489.69 is: 733.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.73 : 1,829.25 = 489.69 : x
  2. Step 2: Convert to fraction form
    1,220.73/1,829.25 = 489.69/x
  3. Step 3: Cross multiply
    1,220.73x = 1,829.25 × 489.69
  4. Step 4: Simplify right side
    1,220.73x = 895,765.43
  5. Step 5: Solve for x
    x = 895,765.43/1,220.73
  6. Step 6: Final answer
    x = 733.79

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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.