Home / 3,128.14-4,692.03-936.91

Finding the Fourth Proportional to 3,128.14, 4,692.03 and 936.91

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Solution

The fourth proportional to 3,128.14, 4,692.03 and 936.91 is: 1,405.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.14 : 4,692.03 = 936.91 : x
  2. Step 2: Convert to fraction form
    3,128.14/4,692.03 = 936.91/x
  3. Step 3: Cross multiply
    3,128.14x = 4,692.03 × 936.91
  4. Step 4: Simplify right side
    3,128.14x = 4,396,009.83
  5. Step 5: Solve for x
    x = 4,396,009.83/3,128.14
  6. Step 6: Final answer
    x = 1,405.31

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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.