Home / 2,208.20-3,310.18-821.16

Finding the Fourth Proportional to 2,208.20, 3,310.18 and 821.16

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Solution

The fourth proportional to 2,208.20, 3,310.18 and 821.16 is: 1,230.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,208.20 : 3,310.18 = 821.16 : x
  2. Step 2: Convert to fraction form
    2,208.20/3,310.18 = 821.16/x
  3. Step 3: Cross multiply
    2,208.20x = 3,310.18 × 821.16
  4. Step 4: Simplify right side
    2,208.20x = 2,718,185.36
  5. Step 5: Solve for x
    x = 2,718,185.36/2,208.20
  6. Step 6: Final answer
    x = 1,230.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.