Home / 1,991.08-2,747.82-1,369

Finding the Fourth Proportional to 1,991.08, 2,747.82 and 1,369

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Solution

The fourth proportional to 1,991.08, 2,747.82 and 1,369 is: 1,889.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.08 : 2,747.82 = 1,369 : x
  2. Step 2: Convert to fraction form
    1,991.08/2,747.82 = 1,369/x
  3. Step 3: Cross multiply
    1,991.08x = 2,747.82 × 1,369
  4. Step 4: Simplify right side
    1,991.08x = 3,761,765.58
  5. Step 5: Solve for x
    x = 3,761,765.58/1,991.08
  6. Step 6: Final answer
    x = 1,889.31

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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.