Home / 3,128.72-4,692.26-936.86

Finding the Fourth Proportional to 3,128.72, 4,692.26 and 936.86

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Solution

The fourth proportional to 3,128.72, 4,692.26 and 936.86 is: 1,405.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.72 : 4,692.26 = 936.86 : x
  2. Step 2: Convert to fraction form
    3,128.72/4,692.26 = 936.86/x
  3. Step 3: Cross multiply
    3,128.72x = 4,692.26 × 936.86
  4. Step 4: Simplify right side
    3,128.72x = 4,395,990.70
  5. Step 5: Solve for x
    x = 4,395,990.70/3,128.72
  6. Step 6: Final answer
    x = 1,405.04

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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.