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Finding the Fourth Proportional to 1,993.34, 2,989.14 and 838.28

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Solution

The fourth proportional to 1,993.34, 2,989.14 and 838.28 is: 1,257.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993.34 : 2,989.14 = 838.28 : x
  2. Step 2: Convert to fraction form
    1,993.34/2,989.14 = 838.28/x
  3. Step 3: Cross multiply
    1,993.34x = 2,989.14 × 838.28
  4. Step 4: Simplify right side
    1,993.34x = 2,505,736.28
  5. Step 5: Solve for x
    x = 2,505,736.28/1,993.34
  6. Step 6: Final answer
    x = 1,257.05

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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.