Home / 2,107.28-2,907.79-1,222.97

Finding the Fourth Proportional to 2,107.28, 2,907.79 and 1,222.97

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Solution

The fourth proportional to 2,107.28, 2,907.79 and 1,222.97 is: 1,687.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.28 : 2,907.79 = 1,222.97 : x
  2. Step 2: Convert to fraction form
    2,107.28/2,907.79 = 1,222.97/x
  3. Step 3: Cross multiply
    2,107.28x = 2,907.79 × 1,222.97
  4. Step 4: Simplify right side
    2,107.28x = 3,556,122.34
  5. Step 5: Solve for x
    x = 3,556,122.34/2,107.28
  6. Step 6: Final answer
    x = 1,687.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.