Home / 3,409.90-5,115.83-1,218.79

Finding the Fourth Proportional to 3,409.90, 5,115.83 and 1,218.79

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Solution

The fourth proportional to 3,409.90, 5,115.83 and 1,218.79 is: 1,828.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,409.90 : 5,115.83 = 1,218.79 : x
  2. Step 2: Convert to fraction form
    3,409.90/5,115.83 = 1,218.79/x
  3. Step 3: Cross multiply
    3,409.90x = 5,115.83 × 1,218.79
  4. Step 4: Simplify right side
    3,409.90x = 6,235,122.45
  5. Step 5: Solve for x
    x = 6,235,122.45/3,409.90
  6. Step 6: Final answer
    x = 1,828.54

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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.