Home / 1,991.88-2,748.70-1,107.74

Finding the Fourth Proportional to 1,991.88, 2,748.70 and 1,107.74

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Solution

The fourth proportional to 1,991.88, 2,748.70 and 1,107.74 is: 1,528.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.88 : 2,748.70 = 1,107.74 : x
  2. Step 2: Convert to fraction form
    1,991.88/2,748.70 = 1,107.74/x
  3. Step 3: Cross multiply
    1,991.88x = 2,748.70 × 1,107.74
  4. Step 4: Simplify right side
    1,991.88x = 3,044,844.94
  5. Step 5: Solve for x
    x = 3,044,844.94/1,991.88
  6. Step 6: Final answer
    x = 1,528.63

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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.