Home / 2,028.11-2,798.81-1,189.31

Finding the Fourth Proportional to 2,028.11, 2,798.81 and 1,189.31

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Solution

The fourth proportional to 2,028.11, 2,798.81 and 1,189.31 is: 1,641.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,028.11 : 2,798.81 = 1,189.31 : x
  2. Step 2: Convert to fraction form
    2,028.11/2,798.81 = 1,189.31/x
  3. Step 3: Cross multiply
    2,028.11x = 2,798.81 × 1,189.31
  4. Step 4: Simplify right side
    2,028.11x = 3,328,632.78
  5. Step 5: Solve for x
    x = 3,328,632.78/2,028.11
  6. Step 6: Final answer
    x = 1,641.25

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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.