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Finding the Fourth Proportional to 1,959.80, 2,940.33 and 727.31

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Solution

The fourth proportional to 1,959.80, 2,940.33 and 727.31 is: 1,091.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959.80 : 2,940.33 = 727.31 : x
  2. Step 2: Convert to fraction form
    1,959.80/2,940.33 = 727.31/x
  3. Step 3: Cross multiply
    1,959.80x = 2,940.33 × 727.31
  4. Step 4: Simplify right side
    1,959.80x = 2,138,541.49
  5. Step 5: Solve for x
    x = 2,138,541.49/1,959.80
  6. Step 6: Final answer
    x = 1,091.21

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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.