Home / 2,679.30-4,020.76-1,218.60

Finding the Fourth Proportional to 2,679.30, 4,020.76 and 1,218.60

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Solution

The fourth proportional to 2,679.30, 4,020.76 and 1,218.60 is: 1,828.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.30 : 4,020.76 = 1,218.60 : x
  2. Step 2: Convert to fraction form
    2,679.30/4,020.76 = 1,218.60/x
  3. Step 3: Cross multiply
    2,679.30x = 4,020.76 × 1,218.60
  4. Step 4: Simplify right side
    2,679.30x = 4,899,698.14
  5. Step 5: Solve for x
    x = 4,899,698.14/2,679.30
  6. Step 6: Final answer
    x = 1,828.72

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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.