Home / 1,991.73-2,748.57-1,107.60

Finding the Fourth Proportional to 1,991.73, 2,748.57 and 1,107.60

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Solution

The fourth proportional to 1,991.73, 2,748.57 and 1,107.60 is: 1,528.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.73 : 2,748.57 = 1,107.60 : x
  2. Step 2: Convert to fraction form
    1,991.73/2,748.57 = 1,107.60/x
  3. Step 3: Cross multiply
    1,991.73x = 2,748.57 × 1,107.60
  4. Step 4: Simplify right side
    1,991.73x = 3,044,316.13
  5. Step 5: Solve for x
    x = 3,044,316.13/1,991.73
  6. Step 6: Final answer
    x = 1,528.48

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1.5x scale

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.