Home / 2,759.12-4,140.20-1,220.08

Finding the Fourth Proportional to 2,759.12, 4,140.20 and 1,220.08

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Solution

The fourth proportional to 2,759.12, 4,140.20 and 1,220.08 is: 1,830.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,759.12 : 4,140.20 = 1,220.08 : x
  2. Step 2: Convert to fraction form
    2,759.12/4,140.20 = 1,220.08/x
  3. Step 3: Cross multiply
    2,759.12x = 4,140.20 × 1,220.08
  4. Step 4: Simplify right side
    2,759.12x = 5,051,375.22
  5. Step 5: Solve for x
    x = 5,051,375.22/2,759.12
  6. Step 6: Final answer
    x = 1,830.79

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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.