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Finding the Fourth Proportional to 2,212.60, 3,318.90 and 1,850.80

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Solution

The fourth proportional to 2,212.60, 3,318.90 and 1,850.80 is: 2,776.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.60 : 3,318.90 = 1,850.80 : x
  2. Step 2: Convert to fraction form
    2,212.60/3,318.90 = 1,850.80/x
  3. Step 3: Cross multiply
    2,212.60x = 3,318.90 × 1,850.80
  4. Step 4: Simplify right side
    2,212.60x = 6,142,620.12
  5. Step 5: Solve for x
    x = 6,142,620.12/2,212.60
  6. Step 6: Final answer
    x = 2,776.20

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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.