Home / 3,939.80-5,435.40-2,260.60

Finding the Fourth Proportional to 3,939.80, 5,435.40 and 2,260.60

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Solution

The fourth proportional to 3,939.80, 5,435.40 and 2,260.60 is: 3,118.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.80 : 5,435.40 = 2,260.60 : x
  2. Step 2: Convert to fraction form
    3,939.80/5,435.40 = 2,260.60/x
  3. Step 3: Cross multiply
    3,939.80x = 5,435.40 × 2,260.60
  4. Step 4: Simplify right side
    3,939.80x = 12,287,265.24
  5. Step 5: Solve for x
    x = 12,287,265.24/3,939.80
  6. Step 6: Final answer
    x = 3,118.75

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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.