Home / 1,819.68-2,511.12-1,111.28

Finding the Fourth Proportional to 1,819.68, 2,511.12 and 1,111.28

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Solution

The fourth proportional to 1,819.68, 2,511.12 and 1,111.28 is: 1,533.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,819.68 : 2,511.12 = 1,111.28 : x
  2. Step 2: Convert to fraction form
    1,819.68/2,511.12 = 1,111.28/x
  3. Step 3: Cross multiply
    1,819.68x = 2,511.12 × 1,111.28
  4. Step 4: Simplify right side
    1,819.68x = 2,790,557.43
  5. Step 5: Solve for x
    x = 2,790,557.43/1,819.68
  6. Step 6: Final answer
    x = 1,533.54

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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.