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Finding the Fourth Proportional to 1,643.22, 2,268 and 1,118.88

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Solution

The fourth proportional to 1,643.22, 2,268 and 1,118.88 is: 1,544.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.22 : 2,268 = 1,118.88 : x
  2. Step 2: Convert to fraction form
    1,643.22/2,268 = 1,118.88/x
  3. Step 3: Cross multiply
    1,643.22x = 2,268 × 1,118.88
  4. Step 4: Simplify right side
    1,643.22x = 2,537,619.84
  5. Step 5: Solve for x
    x = 2,537,619.84/1,643.22
  6. Step 6: Final answer
    x = 1,544.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.