Home / 2,638.68-3,641.36-1,643.90

Finding the Fourth Proportional to 2,638.68, 3,641.36 and 1,643.90

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Solution

The fourth proportional to 2,638.68, 3,641.36 and 1,643.90 is: 2,268.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638.68 : 3,641.36 = 1,643.90 : x
  2. Step 2: Convert to fraction form
    2,638.68/3,641.36 = 1,643.90/x
  3. Step 3: Cross multiply
    2,638.68x = 3,641.36 × 1,643.90
  4. Step 4: Simplify right side
    2,638.68x = 5,986,005.28
  5. Step 5: Solve for x
    x = 5,986,005.28/2,638.68
  6. Step 6: Final answer
    x = 2,268.56

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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.