Home / 1,788.12-2,679.99-1,268.28

Finding the Fourth Proportional to 1,788.12, 2,679.99 and 1,268.28

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Solution

The fourth proportional to 1,788.12, 2,679.99 and 1,268.28 is: 1,900.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,788.12 : 2,679.99 = 1,268.28 : x
  2. Step 2: Convert to fraction form
    1,788.12/2,679.99 = 1,268.28/x
  3. Step 3: Cross multiply
    1,788.12x = 2,679.99 × 1,268.28
  4. Step 4: Simplify right side
    1,788.12x = 3,398,977.72
  5. Step 5: Solve for x
    x = 3,398,977.72/1,788.12
  6. Step 6: Final answer
    x = 1,900.87

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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.