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Finding the Fourth Proportional to 1,993.58, 2,751 and 1,247.50

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Solution

The fourth proportional to 1,993.58, 2,751 and 1,247.50 is: 1,721.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993.58 : 2,751 = 1,247.50 : x
  2. Step 2: Convert to fraction form
    1,993.58/2,751 = 1,247.50/x
  3. Step 3: Cross multiply
    1,993.58x = 2,751 × 1,247.50
  4. Step 4: Simplify right side
    1,993.58x = 3,431,872.50
  5. Step 5: Solve for x
    x = 3,431,872.50/1,993.58
  6. Step 6: Final answer
    x = 1,721.46

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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.