Home / 3,842.20-5,763.30-1,379.80

Finding the Fourth Proportional to 3,842.20, 5,763.30 and 1,379.80

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Solution

The fourth proportional to 3,842.20, 5,763.30 and 1,379.80 is: 2,069.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,842.20 : 5,763.30 = 1,379.80 : x
  2. Step 2: Convert to fraction form
    3,842.20/5,763.30 = 1,379.80/x
  3. Step 3: Cross multiply
    3,842.20x = 5,763.30 × 1,379.80
  4. Step 4: Simplify right side
    3,842.20x = 7,952,201.34
  5. Step 5: Solve for x
    x = 7,952,201.34/3,842.20
  6. Step 6: Final answer
    x = 2,069.70

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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.