Home / 1,991.48-2,748.22-1,107.36

Finding the Fourth Proportional to 1,991.48, 2,748.22 and 1,107.36

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Solution

The fourth proportional to 1,991.48, 2,748.22 and 1,107.36 is: 1,528.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.48 : 2,748.22 = 1,107.36 : x
  2. Step 2: Convert to fraction form
    1,991.48/2,748.22 = 1,107.36/x
  3. Step 3: Cross multiply
    1,991.48x = 2,748.22 × 1,107.36
  4. Step 4: Simplify right side
    1,991.48x = 3,043,268.90
  5. Step 5: Solve for x
    x = 3,043,268.90/1,991.48
  6. Step 6: Final answer
    x = 1,528.14

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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.