Home / 2,128-2,936.41-1,243.69

Finding the Fourth Proportional to 2,128, 2,936.41 and 1,243.69

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Solution

The fourth proportional to 2,128, 2,936.41 and 1,243.69 is: 1,716.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128 : 2,936.41 = 1,243.69 : x
  2. Step 2: Convert to fraction form
    2,128/2,936.41 = 1,243.69/x
  3. Step 3: Cross multiply
    2,128x = 2,936.41 × 1,243.69
  4. Step 4: Simplify right side
    2,128x = 3,651,983.75
  5. Step 5: Solve for x
    x = 3,651,983.75/2,128
  6. Step 6: Final answer
    x = 1,716.16

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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.