Home / 1,991.37-2,748.19-1,107.16

Finding the Fourth Proportional to 1,991.37, 2,748.19 and 1,107.16

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Solution

The fourth proportional to 1,991.37, 2,748.19 and 1,107.16 is: 1,527.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.37 : 2,748.19 = 1,107.16 : x
  2. Step 2: Convert to fraction form
    1,991.37/2,748.19 = 1,107.16/x
  3. Step 3: Cross multiply
    1,991.37x = 2,748.19 × 1,107.16
  4. Step 4: Simplify right side
    1,991.37x = 3,042,686.04
  5. Step 5: Solve for x
    x = 3,042,686.04/1,991.37
  6. Step 6: Final answer
    x = 1,527.94

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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.