Home / 3,119.90-4,680.70-1,270.60

Finding the Fourth Proportional to 3,119.90, 4,680.70 and 1,270.60

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Solution

The fourth proportional to 3,119.90, 4,680.70 and 1,270.60 is: 1,906.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.90 : 4,680.70 = 1,270.60 : x
  2. Step 2: Convert to fraction form
    3,119.90/4,680.70 = 1,270.60/x
  3. Step 3: Cross multiply
    3,119.90x = 4,680.70 × 1,270.60
  4. Step 4: Simplify right side
    3,119.90x = 5,947,297.42
  5. Step 5: Solve for x
    x = 5,947,297.42/3,119.90
  6. Step 6: Final answer
    x = 1,906.25

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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.