Home / 1,643.55-2,268.60-1,119.88

Finding the Fourth Proportional to 1,643.55, 2,268.60 and 1,119.88

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Solution

The fourth proportional to 1,643.55, 2,268.60 and 1,119.88 is: 1,545.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.55 : 2,268.60 = 1,119.88 : x
  2. Step 2: Convert to fraction form
    1,643.55/2,268.60 = 1,119.88/x
  3. Step 3: Cross multiply
    1,643.55x = 2,268.60 × 1,119.88
  4. Step 4: Simplify right side
    1,643.55x = 2,540,559.77
  5. Step 5: Solve for x
    x = 2,540,559.77/1,643.55
  6. Step 6: Final answer
    x = 1,545.78

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1.5x scale

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.