Home / 2,107.29-2,907.75-1,222.92

Finding the Fourth Proportional to 2,107.29, 2,907.75 and 1,222.92

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Solution

The fourth proportional to 2,107.29, 2,907.75 and 1,222.92 is: 1,687.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.29 : 2,907.75 = 1,222.92 : x
  2. Step 2: Convert to fraction form
    2,107.29/2,907.75 = 1,222.92/x
  3. Step 3: Cross multiply
    2,107.29x = 2,907.75 × 1,222.92
  4. Step 4: Simplify right side
    2,107.29x = 3,555,951.52
  5. Step 5: Solve for x
    x = 3,555,951.52/2,107.29
  6. Step 6: Final answer
    x = 1,687.45

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1.5x scale

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.