Home / 2,184.60-3,268.80-1,990.20

Finding the Fourth Proportional to 2,184.60, 3,268.80 and 1,990.20

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Solution

The fourth proportional to 2,184.60, 3,268.80 and 1,990.20 is: 2,977.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,184.60 : 3,268.80 = 1,990.20 : x
  2. Step 2: Convert to fraction form
    2,184.60/3,268.80 = 1,990.20/x
  3. Step 3: Cross multiply
    2,184.60x = 3,268.80 × 1,990.20
  4. Step 4: Simplify right side
    2,184.60x = 6,505,565.76
  5. Step 5: Solve for x
    x = 6,505,565.76/2,184.60
  6. Step 6: Final answer
    x = 2,977.92

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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.