Home / 2,168.78-2,992.95-1,224.54

Finding the Fourth Proportional to 2,168.78, 2,992.95 and 1,224.54

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Solution

The fourth proportional to 2,168.78, 2,992.95 and 1,224.54 is: 1,689.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,168.78 : 2,992.95 = 1,224.54 : x
  2. Step 2: Convert to fraction form
    2,168.78/2,992.95 = 1,224.54/x
  3. Step 3: Cross multiply
    2,168.78x = 2,992.95 × 1,224.54
  4. Step 4: Simplify right side
    2,168.78x = 3,664,986.99
  5. Step 5: Solve for x
    x = 3,664,986.99/2,168.78
  6. Step 6: Final answer
    x = 1,689.89

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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.