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Finding the Fourth Proportional to 3,879.96, 5,820.47 and 1,246.84

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Solution

The fourth proportional to 3,879.96, 5,820.47 and 1,246.84 is: 1,870.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.96 : 5,820.47 = 1,246.84 : x
  2. Step 2: Convert to fraction form
    3,879.96/5,820.47 = 1,246.84/x
  3. Step 3: Cross multiply
    3,879.96x = 5,820.47 × 1,246.84
  4. Step 4: Simplify right side
    3,879.96x = 7,257,174.03
  5. Step 5: Solve for x
    x = 7,257,174.03/3,879.96
  6. Step 6: Final answer
    x = 1,870.42

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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.