Home / 2,212.60-3,314.80-1,288.60

Finding the Fourth Proportional to 2,212.60, 3,314.80 and 1,288.60

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Solution

The fourth proportional to 2,212.60, 3,314.80 and 1,288.60 is: 1,930.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.60 : 3,314.80 = 1,288.60 : x
  2. Step 2: Convert to fraction form
    2,212.60/3,314.80 = 1,288.60/x
  3. Step 3: Cross multiply
    2,212.60x = 3,314.80 × 1,288.60
  4. Step 4: Simplify right side
    2,212.60x = 4,271,451.28
  5. Step 5: Solve for x
    x = 4,271,451.28/2,212.60
  6. Step 6: Final answer
    x = 1,930.51

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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.