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Finding the Fourth Proportional to 1,993.44, 2,986.92 and 1,172.46

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Solution

The fourth proportional to 1,993.44, 2,986.92 and 1,172.46 is: 1,756.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993.44 : 2,986.92 = 1,172.46 : x
  2. Step 2: Convert to fraction form
    1,993.44/2,986.92 = 1,172.46/x
  3. Step 3: Cross multiply
    1,993.44x = 2,986.92 × 1,172.46
  4. Step 4: Simplify right side
    1,993.44x = 3,502,044.22
  5. Step 5: Solve for x
    x = 3,502,044.22/1,993.44
  6. Step 6: Final answer
    x = 1,756.78

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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.