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Finding the Fourth Proportional to 2,694.80, 4,041.90 and 939.47

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Solution

The fourth proportional to 2,694.80, 4,041.90 and 939.47 is: 1,409.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,694.80 : 4,041.90 = 939.47 : x
  2. Step 2: Convert to fraction form
    2,694.80/4,041.90 = 939.47/x
  3. Step 3: Cross multiply
    2,694.80x = 4,041.90 × 939.47
  4. Step 4: Simplify right side
    2,694.80x = 3,797,223.58
  5. Step 5: Solve for x
    x = 3,797,223.58/2,694.80
  6. Step 6: Final answer
    x = 1,409.09

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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.