Home / 2,830.12-4,245.60-1,185.80

Finding the Fourth Proportional to 2,830.12, 4,245.60 and 1,185.80

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Solution

The fourth proportional to 2,830.12, 4,245.60 and 1,185.80 is: 1,778.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,830.12 : 4,245.60 = 1,185.80 : x
  2. Step 2: Convert to fraction form
    2,830.12/4,245.60 = 1,185.80/x
  3. Step 3: Cross multiply
    2,830.12x = 4,245.60 × 1,185.80
  4. Step 4: Simplify right side
    2,830.12x = 5,034,432.48
  5. Step 5: Solve for x
    x = 5,034,432.48/2,830.12
  6. Step 6: Final answer
    x = 1,778.88

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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.