Home / 3,231.45-4,454.89-2,169.40

Finding the Fourth Proportional to 3,231.45, 4,454.89 and 2,169.40

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Solution

The fourth proportional to 3,231.45, 4,454.89 and 2,169.40 is: 2,990.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,231.45 : 4,454.89 = 2,169.40 : x
  2. Step 2: Convert to fraction form
    3,231.45/4,454.89 = 2,169.40/x
  3. Step 3: Cross multiply
    3,231.45x = 4,454.89 × 2,169.40
  4. Step 4: Simplify right side
    3,231.45x = 9,664,438.37
  5. Step 5: Solve for x
    x = 9,664,438.37/3,231.45
  6. Step 6: Final answer
    x = 2,990.74

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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.