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Finding the Fourth Proportional to 1,994.80, 2,753.08 and 1,208.84

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Solution

The fourth proportional to 1,994.80, 2,753.08 and 1,208.84 is: 1,668.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994.80 : 2,753.08 = 1,208.84 : x
  2. Step 2: Convert to fraction form
    1,994.80/2,753.08 = 1,208.84/x
  3. Step 3: Cross multiply
    1,994.80x = 2,753.08 × 1,208.84
  4. Step 4: Simplify right side
    1,994.80x = 3,328,033.23
  5. Step 5: Solve for x
    x = 3,328,033.23/1,994.80
  6. Step 6: Final answer
    x = 1,668.35

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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.