Home / 1,983.09-2,736.21-1,320.30

Finding the Fourth Proportional to 1,983.09, 2,736.21 and 1,320.30

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Solution

The fourth proportional to 1,983.09, 2,736.21 and 1,320.30 is: 1,821.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,983.09 : 2,736.21 = 1,320.30 : x
  2. Step 2: Convert to fraction form
    1,983.09/2,736.21 = 1,320.30/x
  3. Step 3: Cross multiply
    1,983.09x = 2,736.21 × 1,320.30
  4. Step 4: Simplify right side
    1,983.09x = 3,612,618.06
  5. Step 5: Solve for x
    x = 3,612,618.06/1,983.09
  6. Step 6: Final answer
    x = 1,821.71

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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.