Home / 2,211.60-3,317.40-2,179.20

Finding the Fourth Proportional to 2,211.60, 3,317.40 and 2,179.20

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Solution

The fourth proportional to 2,211.60, 3,317.40 and 2,179.20 is: 3,268.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,211.60 : 3,317.40 = 2,179.20 : x
  2. Step 2: Convert to fraction form
    2,211.60/3,317.40 = 2,179.20/x
  3. Step 3: Cross multiply
    2,211.60x = 3,317.40 × 2,179.20
  4. Step 4: Simplify right side
    2,211.60x = 7,229,278.08
  5. Step 5: Solve for x
    x = 7,229,278.08/2,211.60
  6. Step 6: Final answer
    x = 3,268.80

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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.