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Finding the Fourth Proportional to 1,940.90, 2,678.45 and 1,154.97

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Solution

The fourth proportional to 1,940.90, 2,678.45 and 1,154.97 is: 1,593.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.90 : 2,678.45 = 1,154.97 : x
  2. Step 2: Convert to fraction form
    1,940.90/2,678.45 = 1,154.97/x
  3. Step 3: Cross multiply
    1,940.90x = 2,678.45 × 1,154.97
  4. Step 4: Simplify right side
    1,940.90x = 3,093,523.62
  5. Step 5: Solve for x
    x = 3,093,523.62/1,940.90
  6. Step 6: Final answer
    x = 1,593.86

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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.