Home / 3,456.80-5,185.20-2,679.20

Finding the Fourth Proportional to 3,456.80, 5,185.20 and 2,679.20

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Solution

The fourth proportional to 3,456.80, 5,185.20 and 2,679.20 is: 4,018.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,456.80 : 5,185.20 = 2,679.20 : x
  2. Step 2: Convert to fraction form
    3,456.80/5,185.20 = 2,679.20/x
  3. Step 3: Cross multiply
    3,456.80x = 5,185.20 × 2,679.20
  4. Step 4: Simplify right side
    3,456.80x = 13,892,187.84
  5. Step 5: Solve for x
    x = 13,892,187.84/3,456.80
  6. Step 6: Final answer
    x = 4,018.80

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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.