Home / 1,991.62-2,748.33-1,107.40

Finding the Fourth Proportional to 1,991.62, 2,748.33 and 1,107.40

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Solution

The fourth proportional to 1,991.62, 2,748.33 and 1,107.40 is: 1,528.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.62 : 2,748.33 = 1,107.40 : x
  2. Step 2: Convert to fraction form
    1,991.62/2,748.33 = 1,107.40/x
  3. Step 3: Cross multiply
    1,991.62x = 2,748.33 × 1,107.40
  4. Step 4: Simplify right side
    1,991.62x = 3,043,500.64
  5. Step 5: Solve for x
    x = 3,043,500.64/1,991.62
  6. Step 6: Final answer
    x = 1,528.15

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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.