Home / 1,982.19-2,734.56-1,393.11

Finding the Fourth Proportional to 1,982.19, 2,734.56 and 1,393.11

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Solution

The fourth proportional to 1,982.19, 2,734.56 and 1,393.11 is: 1,921.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.19 : 2,734.56 = 1,393.11 : x
  2. Step 2: Convert to fraction form
    1,982.19/2,734.56 = 1,393.11/x
  3. Step 3: Cross multiply
    1,982.19x = 2,734.56 × 1,393.11
  4. Step 4: Simplify right side
    1,982.19x = 3,809,542.88
  5. Step 5: Solve for x
    x = 3,809,542.88/1,982.19
  6. Step 6: Final answer
    x = 1,921.89

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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.