Home / 3,128.61-4,692.82-1,279.23

Finding the Fourth Proportional to 3,128.61, 4,692.82 and 1,279.23

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Solution

The fourth proportional to 3,128.61, 4,692.82 and 1,279.23 is: 1,918.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.61 : 4,692.82 = 1,279.23 : x
  2. Step 2: Convert to fraction form
    3,128.61/4,692.82 = 1,279.23/x
  3. Step 3: Cross multiply
    3,128.61x = 4,692.82 × 1,279.23
  4. Step 4: Simplify right side
    3,128.61x = 6,003,196.13
  5. Step 5: Solve for x
    x = 6,003,196.13/3,128.61
  6. Step 6: Final answer
    x = 1,918.81

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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.