Home / 2,115.27-3,172.39-882.70

Finding the Fourth Proportional to 2,115.27, 3,172.39 and 882.70

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Solution

The fourth proportional to 2,115.27, 3,172.39 and 882.70 is: 1,323.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.27 : 3,172.39 = 882.70 : x
  2. Step 2: Convert to fraction form
    2,115.27/3,172.39 = 882.70/x
  3. Step 3: Cross multiply
    2,115.27x = 3,172.39 × 882.70
  4. Step 4: Simplify right side
    2,115.27x = 2,800,268.65
  5. Step 5: Solve for x
    x = 2,800,268.65/2,115.27
  6. Step 6: Final answer
    x = 1,323.84

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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.