Home / 2,027.21-2,779.31-1,990.31

Finding the Fourth Proportional to 2,027.21, 2,779.31 and 1,990.31

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Solution

The fourth proportional to 2,027.21, 2,779.31 and 1,990.31 is: 2,728.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,027.21 : 2,779.31 = 1,990.31 : x
  2. Step 2: Convert to fraction form
    2,027.21/2,779.31 = 1,990.31/x
  3. Step 3: Cross multiply
    2,027.21x = 2,779.31 × 1,990.31
  4. Step 4: Simplify right side
    2,027.21x = 5,531,664.64
  5. Step 5: Solve for x
    x = 5,531,664.64/2,027.21
  6. Step 6: Final answer
    x = 2,728.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.