Home / 3,128.46-4,692.70-1,279.58

Finding the Fourth Proportional to 3,128.46, 4,692.70 and 1,279.58

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Solution

The fourth proportional to 3,128.46, 4,692.70 and 1,279.58 is: 1,919.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.46 : 4,692.70 = 1,279.58 : x
  2. Step 2: Convert to fraction form
    3,128.46/4,692.70 = 1,279.58/x
  3. Step 3: Cross multiply
    3,128.46x = 4,692.70 × 1,279.58
  4. Step 4: Simplify right side
    3,128.46x = 6,004,655.20
  5. Step 5: Solve for x
    x = 6,004,655.20/3,128.46
  6. Step 6: Final answer
    x = 1,919.36

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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.