Home / 2,651.65-3,975.41-1,189.78

Finding the Fourth Proportional to 2,651.65, 3,975.41 and 1,189.78

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Solution

The fourth proportional to 2,651.65, 3,975.41 and 1,189.78 is: 1,783.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,651.65 : 3,975.41 = 1,189.78 : x
  2. Step 2: Convert to fraction form
    2,651.65/3,975.41 = 1,189.78/x
  3. Step 3: Cross multiply
    2,651.65x = 3,975.41 × 1,189.78
  4. Step 4: Simplify right side
    2,651.65x = 4,729,871.25
  5. Step 5: Solve for x
    x = 4,729,871.25/2,651.65
  6. Step 6: Final answer
    x = 1,783.75

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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.