Home / 2,819.19-3,891.38-1,980.10

Finding the Fourth Proportional to 2,819.19, 3,891.38 and 1,980.10

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Solution

The fourth proportional to 2,819.19, 3,891.38 and 1,980.10 is: 2,733.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.19 : 3,891.38 = 1,980.10 : x
  2. Step 2: Convert to fraction form
    2,819.19/3,891.38 = 1,980.10/x
  3. Step 3: Cross multiply
    2,819.19x = 3,891.38 × 1,980.10
  4. Step 4: Simplify right side
    2,819.19x = 7,705,292.18
  5. Step 5: Solve for x
    x = 7,705,292.18/2,819.19
  6. Step 6: Final answer
    x = 2,733.16

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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.