Home / 3,977.06-5,965.60-1,380.20

Finding the Fourth Proportional to 3,977.06, 5,965.60 and 1,380.20

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Solution

The fourth proportional to 3,977.06, 5,965.60 and 1,380.20 is: 2,070.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,977.06 : 5,965.60 = 1,380.20 : x
  2. Step 2: Convert to fraction form
    3,977.06/5,965.60 = 1,380.20/x
  3. Step 3: Cross multiply
    3,977.06x = 5,965.60 × 1,380.20
  4. Step 4: Simplify right side
    3,977.06x = 8,233,721.12
  5. Step 5: Solve for x
    x = 8,233,721.12/3,977.06
  6. Step 6: Final answer
    x = 2,070.30

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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.