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Finding the Fourth Proportional to 1,988.73, 2,744.36 and 1,104.58

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Solution

The fourth proportional to 1,988.73, 2,744.36 and 1,104.58 is: 1,524.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.73 : 2,744.36 = 1,104.58 : x
  2. Step 2: Convert to fraction form
    1,988.73/2,744.36 = 1,104.58/x
  3. Step 3: Cross multiply
    1,988.73x = 2,744.36 × 1,104.58
  4. Step 4: Simplify right side
    1,988.73x = 3,031,383.21
  5. Step 5: Solve for x
    x = 3,031,383.21/1,988.73
  6. Step 6: Final answer
    x = 1,524.28

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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.