Home / 1,991.50-2,748.25-1,107.38

Finding the Fourth Proportional to 1,991.50, 2,748.25 and 1,107.38

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Solution

The fourth proportional to 1,991.50, 2,748.25 and 1,107.38 is: 1,528.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.50 : 2,748.25 = 1,107.38 : x
  2. Step 2: Convert to fraction form
    1,991.50/2,748.25 = 1,107.38/x
  3. Step 3: Cross multiply
    1,991.50x = 2,748.25 × 1,107.38
  4. Step 4: Simplify right side
    1,991.50x = 3,043,357.09
  5. Step 5: Solve for x
    x = 3,043,357.09/1,991.50
  6. Step 6: Final answer
    x = 1,528.17

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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.