Home / 1,911.42-2,863.43-1,118.87

Finding the Fourth Proportional to 1,911.42, 2,863.43 and 1,118.87

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Solution

The fourth proportional to 1,911.42, 2,863.43 and 1,118.87 is: 1,676.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.42 : 2,863.43 = 1,118.87 : x
  2. Step 2: Convert to fraction form
    1,911.42/2,863.43 = 1,118.87/x
  3. Step 3: Cross multiply
    1,911.42x = 2,863.43 × 1,118.87
  4. Step 4: Simplify right side
    1,911.42x = 3,203,786.01
  5. Step 5: Solve for x
    x = 3,203,786.01/1,911.42
  6. Step 6: Final answer
    x = 1,676.13

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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.