Home / 3,848.80-5,311.36-2,080.40

Finding the Fourth Proportional to 3,848.80, 5,311.36 and 2,080.40

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Solution

The fourth proportional to 3,848.80, 5,311.36 and 2,080.40 is: 2,870.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,848.80 : 5,311.36 = 2,080.40 : x
  2. Step 2: Convert to fraction form
    3,848.80/5,311.36 = 2,080.40/x
  3. Step 3: Cross multiply
    3,848.80x = 5,311.36 × 2,080.40
  4. Step 4: Simplify right side
    3,848.80x = 11,049,745.27
  5. Step 5: Solve for x
    x = 11,049,745.27/3,848.80
  6. Step 6: Final answer
    x = 2,870.96

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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.