Home / 2,205.89-3,306.31-905.75

Finding the Fourth Proportional to 2,205.89, 3,306.31 and 905.75

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Solution

The fourth proportional to 2,205.89, 3,306.31 and 905.75 is: 1,357.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,205.89 : 3,306.31 = 905.75 : x
  2. Step 2: Convert to fraction form
    2,205.89/3,306.31 = 905.75/x
  3. Step 3: Cross multiply
    2,205.89x = 3,306.31 × 905.75
  4. Step 4: Simplify right side
    2,205.89x = 2,994,690.28
  5. Step 5: Solve for x
    x = 2,994,690.28/2,205.89
  6. Step 6: Final answer
    x = 1,357.59

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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.