Home / 2,830.80-4,247.40-1,369.20

Finding the Fourth Proportional to 2,830.80, 4,247.40 and 1,369.20

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Solution

The fourth proportional to 2,830.80, 4,247.40 and 1,369.20 is: 2,054.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,830.80 : 4,247.40 = 1,369.20 : x
  2. Step 2: Convert to fraction form
    2,830.80/4,247.40 = 1,369.20/x
  3. Step 3: Cross multiply
    2,830.80x = 4,247.40 × 1,369.20
  4. Step 4: Simplify right side
    2,830.80x = 5,815,540.08
  5. Step 5: Solve for x
    x = 5,815,540.08/2,830.80
  6. Step 6: Final answer
    x = 2,054.38

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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.