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Finding the Fourth Proportional to 1,992.85, 2,750.01 and 1,108.60

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Solution

The fourth proportional to 1,992.85, 2,750.01 and 1,108.60 is: 1,529.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.85 : 2,750.01 = 1,108.60 : x
  2. Step 2: Convert to fraction form
    1,992.85/2,750.01 = 1,108.60/x
  3. Step 3: Cross multiply
    1,992.85x = 2,750.01 × 1,108.60
  4. Step 4: Simplify right side
    1,992.85x = 3,048,661.09
  5. Step 5: Solve for x
    x = 3,048,661.09/1,992.85
  6. Step 6: Final answer
    x = 1,529.80

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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.