Home / 3,121.68-4,683.87-1,479.39

Finding the Fourth Proportional to 3,121.68, 4,683.87 and 1,479.39

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Solution

The fourth proportional to 3,121.68, 4,683.87 and 1,479.39 is: 2,219.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.68 : 4,683.87 = 1,479.39 : x
  2. Step 2: Convert to fraction form
    3,121.68/4,683.87 = 1,479.39/x
  3. Step 3: Cross multiply
    3,121.68x = 4,683.87 × 1,479.39
  4. Step 4: Simplify right side
    3,121.68x = 6,929,270.44
  5. Step 5: Solve for x
    x = 6,929,270.44/3,121.68
  6. Step 6: Final answer
    x = 2,219.72

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1.5x scale

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.