Home / 1,940.59-2,678.91-1,143.66

Finding the Fourth Proportional to 1,940.59, 2,678.91 and 1,143.66

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Solution

The fourth proportional to 1,940.59, 2,678.91 and 1,143.66 is: 1,578.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.59 : 2,678.91 = 1,143.66 : x
  2. Step 2: Convert to fraction form
    1,940.59/2,678.91 = 1,143.66/x
  3. Step 3: Cross multiply
    1,940.59x = 2,678.91 × 1,143.66
  4. Step 4: Simplify right side
    1,940.59x = 3,063,762.21
  5. Step 5: Solve for x
    x = 3,063,762.21/1,940.59
  6. Step 6: Final answer
    x = 1,578.78

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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.