Home / 3,218.28-4,441.32-1,821

Finding the Fourth Proportional to 3,218.28, 4,441.32 and 1,821

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Solution

The fourth proportional to 3,218.28, 4,441.32 and 1,821 is: 2,513.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.28 : 4,441.32 = 1,821 : x
  2. Step 2: Convert to fraction form
    3,218.28/4,441.32 = 1,821/x
  3. Step 3: Cross multiply
    3,218.28x = 4,441.32 × 1,821
  4. Step 4: Simplify right side
    3,218.28x = 8,087,643.72
  5. Step 5: Solve for x
    x = 8,087,643.72/3,218.28
  6. Step 6: Final answer
    x = 2,513.03

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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.