Home / 1,268.88-1,904.18-780.44

Finding the Fourth Proportional to 1,268.88, 1,904.18 and 780.44

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Solution

The fourth proportional to 1,268.88, 1,904.18 and 780.44 is: 1,171.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.88 : 1,904.18 = 780.44 : x
  2. Step 2: Convert to fraction form
    1,268.88/1,904.18 = 780.44/x
  3. Step 3: Cross multiply
    1,268.88x = 1,904.18 × 780.44
  4. Step 4: Simplify right side
    1,268.88x = 1,486,098.24
  5. Step 5: Solve for x
    x = 1,486,098.24/1,268.88
  6. Step 6: Final answer
    x = 1,171.19

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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.