Home / 1,819.08-2,728.66-520.56

Finding the Fourth Proportional to 1,819.08, 2,728.66 and 520.56

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Solution

The fourth proportional to 1,819.08, 2,728.66 and 520.56 is: 780.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,819.08 : 2,728.66 = 520.56 : x
  2. Step 2: Convert to fraction form
    1,819.08/2,728.66 = 520.56/x
  3. Step 3: Cross multiply
    1,819.08x = 2,728.66 × 520.56
  4. Step 4: Simplify right side
    1,819.08x = 1,420,431.25
  5. Step 5: Solve for x
    x = 1,420,431.25/1,819.08
  6. Step 6: Final answer
    x = 780.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.