Home / 1,122.27-1,680.78-1,083.33

Finding the Fourth Proportional to 1,122.27, 1,680.78 and 1,083.33

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Solution

The fourth proportional to 1,122.27, 1,680.78 and 1,083.33 is: 1,622.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.27 : 1,680.78 = 1,083.33 : x
  2. Step 2: Convert to fraction form
    1,122.27/1,680.78 = 1,083.33/x
  3. Step 3: Cross multiply
    1,122.27x = 1,680.78 × 1,083.33
  4. Step 4: Simplify right side
    1,122.27x = 1,820,839.40
  5. Step 5: Solve for x
    x = 1,820,839.40/1,122.27
  6. Step 6: Final answer
    x = 1,622.46

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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.