Home / 1,940.85-2,911.28-1,209.42

Finding the Fourth Proportional to 1,940.85, 2,911.28 and 1,209.42

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Solution

The fourth proportional to 1,940.85, 2,911.28 and 1,209.42 is: 1,814.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.85 : 2,911.28 = 1,209.42 : x
  2. Step 2: Convert to fraction form
    1,940.85/2,911.28 = 1,209.42/x
  3. Step 3: Cross multiply
    1,940.85x = 2,911.28 × 1,209.42
  4. Step 4: Simplify right side
    1,940.85x = 3,520,954.21
  5. Step 5: Solve for x
    x = 3,520,954.21/1,940.85
  6. Step 6: Final answer
    x = 1,814.13

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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.