Home / 3,121.25-4,681.90-1,365.88

Finding the Fourth Proportional to 3,121.25, 4,681.90 and 1,365.88

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Solution

The fourth proportional to 3,121.25, 4,681.90 and 1,365.88 is: 2,048.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.25 : 4,681.90 = 1,365.88 : x
  2. Step 2: Convert to fraction form
    3,121.25/4,681.90 = 1,365.88/x
  3. Step 3: Cross multiply
    3,121.25x = 4,681.90 × 1,365.88
  4. Step 4: Simplify right side
    3,121.25x = 6,394,912.35
  5. Step 5: Solve for x
    x = 6,394,912.35/3,121.25
  6. Step 6: Final answer
    x = 2,048.83

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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.