Home / 1,921.41-2,881.90-1,190.79

Finding the Fourth Proportional to 1,921.41, 2,881.90 and 1,190.79

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Solution

The fourth proportional to 1,921.41, 2,881.90 and 1,190.79 is: 1,786.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.41 : 2,881.90 = 1,190.79 : x
  2. Step 2: Convert to fraction form
    1,921.41/2,881.90 = 1,190.79/x
  3. Step 3: Cross multiply
    1,921.41x = 2,881.90 × 1,190.79
  4. Step 4: Simplify right side
    1,921.41x = 3,431,737.70
  5. Step 5: Solve for x
    x = 3,431,737.70/1,921.41
  6. Step 6: Final answer
    x = 1,786.05

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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.