Home / 3,908.55-5,863.68-1,311.42

Finding the Fourth Proportional to 3,908.55, 5,863.68 and 1,311.42

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Solution

The fourth proportional to 3,908.55, 5,863.68 and 1,311.42 is: 1,967.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.55 : 5,863.68 = 1,311.42 : x
  2. Step 2: Convert to fraction form
    3,908.55/5,863.68 = 1,311.42/x
  3. Step 3: Cross multiply
    3,908.55x = 5,863.68 × 1,311.42
  4. Step 4: Simplify right side
    3,908.55x = 7,689,747.23
  5. Step 5: Solve for x
    x = 7,689,747.23/3,908.55
  6. Step 6: Final answer
    x = 1,967.42

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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.