Home / 2,106.78-3,161.16-1,326.60

Finding the Fourth Proportional to 2,106.78, 3,161.16 and 1,326.60

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Solution

The fourth proportional to 2,106.78, 3,161.16 and 1,326.60 is: 1,990.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.78 : 3,161.16 = 1,326.60 : x
  2. Step 2: Convert to fraction form
    2,106.78/3,161.16 = 1,326.60/x
  3. Step 3: Cross multiply
    2,106.78x = 3,161.16 × 1,326.60
  4. Step 4: Simplify right side
    2,106.78x = 4,193,594.86
  5. Step 5: Solve for x
    x = 4,193,594.86/2,106.78
  6. Step 6: Final answer
    x = 1,990.52

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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.