Home / 2,618.12-3,928.70-1,999.99

Finding the Fourth Proportional to 2,618.12, 3,928.70 and 1,999.99

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Solution

The fourth proportional to 2,618.12, 3,928.70 and 1,999.99 is: 3,001.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618.12 : 3,928.70 = 1,999.99 : x
  2. Step 2: Convert to fraction form
    2,618.12/3,928.70 = 1,999.99/x
  3. Step 3: Cross multiply
    2,618.12x = 3,928.70 × 1,999.99
  4. Step 4: Simplify right side
    2,618.12x = 7,857,370.62
  5. Step 5: Solve for x
    x = 7,857,370.62/2,618.12
  6. Step 6: Final answer
    x = 3,001.15

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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.