Home / 3,975.21-5,485.75-2,206.80

Finding the Fourth Proportional to 3,975.21, 5,485.75 and 2,206.80

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Solution

The fourth proportional to 3,975.21, 5,485.75 and 2,206.80 is: 3,045.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,975.21 : 5,485.75 = 2,206.80 : x
  2. Step 2: Convert to fraction form
    3,975.21/5,485.75 = 2,206.80/x
  3. Step 3: Cross multiply
    3,975.21x = 5,485.75 × 2,206.80
  4. Step 4: Simplify right side
    3,975.21x = 12,105,953.10
  5. Step 5: Solve for x
    x = 12,105,953.10/3,975.21
  6. Step 6: Final answer
    x = 3,045.36

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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.