Home / 4,186.40-6,279.60-3,408.80

Finding the Fourth Proportional to 4,186.40, 6,279.60 and 3,408.80

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Solution

The fourth proportional to 4,186.40, 6,279.60 and 3,408.80 is: 5,113.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,186.40 : 6,279.60 = 3,408.80 : x
  2. Step 2: Convert to fraction form
    4,186.40/6,279.60 = 3,408.80/x
  3. Step 3: Cross multiply
    4,186.40x = 6,279.60 × 3,408.80
  4. Step 4: Simplify right side
    4,186.40x = 21,405,900.48
  5. Step 5: Solve for x
    x = 21,405,900.48/4,186.40
  6. Step 6: Final answer
    x = 5,113.20

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1.5x scale

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.