Home / 1,928.57-2,661.48-1,172.09

Finding the Fourth Proportional to 1,928.57, 2,661.48 and 1,172.09

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Solution

The fourth proportional to 1,928.57, 2,661.48 and 1,172.09 is: 1,617.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.57 : 2,661.48 = 1,172.09 : x
  2. Step 2: Convert to fraction form
    1,928.57/2,661.48 = 1,172.09/x
  3. Step 3: Cross multiply
    1,928.57x = 2,661.48 × 1,172.09
  4. Step 4: Simplify right side
    1,928.57x = 3,119,488.23
  5. Step 5: Solve for x
    x = 3,119,488.23/1,928.57
  6. Step 6: Final answer
    x = 1,617.51

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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.