Home / 3,119.82-4,305.20-1,940.87

Finding the Fourth Proportional to 3,119.82, 4,305.20 and 1,940.87

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Solution

The fourth proportional to 3,119.82, 4,305.20 and 1,940.87 is: 2,678.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.82 : 4,305.20 = 1,940.87 : x
  2. Step 2: Convert to fraction form
    3,119.82/4,305.20 = 1,940.87/x
  3. Step 3: Cross multiply
    3,119.82x = 4,305.20 × 1,940.87
  4. Step 4: Simplify right side
    3,119.82x = 8,355,802.29
  5. Step 5: Solve for x
    x = 8,355,802.29/3,119.82
  6. Step 6: Final answer
    x = 2,678.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.