Home / 3,928.60-5,890.96-1,429.72

Finding the Fourth Proportional to 3,928.60, 5,890.96 and 1,429.72

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Solution

The fourth proportional to 3,928.60, 5,890.96 and 1,429.72 is: 2,143.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.60 : 5,890.96 = 1,429.72 : x
  2. Step 2: Convert to fraction form
    3,928.60/5,890.96 = 1,429.72/x
  3. Step 3: Cross multiply
    3,928.60x = 5,890.96 × 1,429.72
  4. Step 4: Simplify right side
    3,928.60x = 8,422,423.33
  5. Step 5: Solve for x
    x = 8,422,423.33/3,928.60
  6. Step 6: Final answer
    x = 2,143.87

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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.