Home / 3,981.89-5,972.84-1,208.58

Finding the Fourth Proportional to 3,981.89, 5,972.84 and 1,208.58

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Solution

The fourth proportional to 3,981.89, 5,972.84 and 1,208.58 is: 1,812.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.89 : 5,972.84 = 1,208.58 : x
  2. Step 2: Convert to fraction form
    3,981.89/5,972.84 = 1,208.58/x
  3. Step 3: Cross multiply
    3,981.89x = 5,972.84 × 1,208.58
  4. Step 4: Simplify right side
    3,981.89x = 7,218,648.92
  5. Step 5: Solve for x
    x = 7,218,648.92/3,981.89
  6. Step 6: Final answer
    x = 1,812.87

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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.