Home / 2,208.06-3,311.69-821.04

Finding the Fourth Proportional to 2,208.06, 3,311.69 and 821.04

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Solution

The fourth proportional to 2,208.06, 3,311.69 and 821.04 is: 1,231.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,208.06 : 3,311.69 = 821.04 : x
  2. Step 2: Convert to fraction form
    2,208.06/3,311.69 = 821.04/x
  3. Step 3: Cross multiply
    2,208.06x = 3,311.69 × 821.04
  4. Step 4: Simplify right side
    2,208.06x = 2,719,013.43
  5. Step 5: Solve for x
    x = 2,719,013.43/2,208.06
  6. Step 6: Final answer
    x = 1,231.40

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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.