Home / 2,187.38-3,281.67-1,212.95

Finding the Fourth Proportional to 2,187.38, 3,281.67 and 1,212.95

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Solution

The fourth proportional to 2,187.38, 3,281.67 and 1,212.95 is: 1,819.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.38 : 3,281.67 = 1,212.95 : x
  2. Step 2: Convert to fraction form
    2,187.38/3,281.67 = 1,212.95/x
  3. Step 3: Cross multiply
    2,187.38x = 3,281.67 × 1,212.95
  4. Step 4: Simplify right side
    2,187.38x = 3,980,485.22
  5. Step 5: Solve for x
    x = 3,980,485.22/2,187.38
  6. Step 6: Final answer
    x = 1,819.75

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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.