Home / 2,143.78-3,218.62-1,104.64

Finding the Fourth Proportional to 2,143.78, 3,218.62 and 1,104.64

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Solution

The fourth proportional to 2,143.78, 3,218.62 and 1,104.64 is: 1,658.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.78 : 3,218.62 = 1,104.64 : x
  2. Step 2: Convert to fraction form
    2,143.78/3,218.62 = 1,104.64/x
  3. Step 3: Cross multiply
    2,143.78x = 3,218.62 × 1,104.64
  4. Step 4: Simplify right side
    2,143.78x = 3,555,416.40
  5. Step 5: Solve for x
    x = 3,555,416.40/2,143.78
  6. Step 6: Final answer
    x = 1,658.48

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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.