Home / 2,128.26-2,936.76-1,219.74

Finding the Fourth Proportional to 2,128.26, 2,936.76 and 1,219.74

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Solution

The fourth proportional to 2,128.26, 2,936.76 and 1,219.74 is: 1,683.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.26 : 2,936.76 = 1,219.74 : x
  2. Step 2: Convert to fraction form
    2,128.26/2,936.76 = 1,219.74/x
  3. Step 3: Cross multiply
    2,128.26x = 2,936.76 × 1,219.74
  4. Step 4: Simplify right side
    2,128.26x = 3,582,083.64
  5. Step 5: Solve for x
    x = 3,582,083.64/2,128.26
  6. Step 6: Final answer
    x = 1,683.10

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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.