Home / 3,994.57-5,989.78-1,220.68

Finding the Fourth Proportional to 3,994.57, 5,989.78 and 1,220.68

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Solution

The fourth proportional to 3,994.57, 5,989.78 and 1,220.68 is: 1,830.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,994.57 : 5,989.78 = 1,220.68 : x
  2. Step 2: Convert to fraction form
    3,994.57/5,989.78 = 1,220.68/x
  3. Step 3: Cross multiply
    3,994.57x = 5,989.78 × 1,220.68
  4. Step 4: Simplify right side
    3,994.57x = 7,311,604.65
  5. Step 5: Solve for x
    x = 7,311,604.65/3,994.57
  6. Step 6: Final answer
    x = 1,830.39

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1.5x scale

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.