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Finding the Fourth Proportional to 3,879.80, 5,818.82 and 1,106.42

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Solution

The fourth proportional to 3,879.80, 5,818.82 and 1,106.42 is: 1,659.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.80 : 5,818.82 = 1,106.42 : x
  2. Step 2: Convert to fraction form
    3,879.80/5,818.82 = 1,106.42/x
  3. Step 3: Cross multiply
    3,879.80x = 5,818.82 × 1,106.42
  4. Step 4: Simplify right side
    3,879.80x = 6,438,058.82
  5. Step 5: Solve for x
    x = 6,438,058.82/3,879.80
  6. Step 6: Final answer
    x = 1,659.38

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1.5x scale

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.