Home / 3,280.20-4,915.80-2,106.60

Finding the Fourth Proportional to 3,280.20, 4,915.80 and 2,106.60

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Solution

The fourth proportional to 3,280.20, 4,915.80 and 2,106.60 is: 3,157.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.20 : 4,915.80 = 2,106.60 : x
  2. Step 2: Convert to fraction form
    3,280.20/4,915.80 = 2,106.60/x
  3. Step 3: Cross multiply
    3,280.20x = 4,915.80 × 2,106.60
  4. Step 4: Simplify right side
    3,280.20x = 10,355,624.28
  5. Step 5: Solve for x
    x = 10,355,624.28/3,280.20
  6. Step 6: Final answer
    x = 3,157.01

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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.