Home / 3,975.30-5,485.68-2,206.80

Finding the Fourth Proportional to 3,975.30, 5,485.68 and 2,206.80

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Solution

The fourth proportional to 3,975.30, 5,485.68 and 2,206.80 is: 3,045.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,975.30 : 5,485.68 = 2,206.80 : x
  2. Step 2: Convert to fraction form
    3,975.30/5,485.68 = 2,206.80/x
  3. Step 3: Cross multiply
    3,975.30x = 5,485.68 × 2,206.80
  4. Step 4: Simplify right side
    3,975.30x = 12,105,798.62
  5. Step 5: Solve for x
    x = 12,105,798.62/3,975.30
  6. Step 6: Final answer
    x = 3,045.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.