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Finding the Fourth Proportional to 1,992.77, 2,988.83 and 1,252.43

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Solution

The fourth proportional to 1,992.77, 2,988.83 and 1,252.43 is: 1,878.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.77 : 2,988.83 = 1,252.43 : x
  2. Step 2: Convert to fraction form
    1,992.77/2,988.83 = 1,252.43/x
  3. Step 3: Cross multiply
    1,992.77x = 2,988.83 × 1,252.43
  4. Step 4: Simplify right side
    1,992.77x = 3,743,299.75
  5. Step 5: Solve for x
    x = 3,743,299.75/1,992.77
  6. Step 6: Final answer
    x = 1,878.44

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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.