Home / 2,987.23-4,480.61-1,231.78

Finding the Fourth Proportional to 2,987.23, 4,480.61 and 1,231.78

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Solution

The fourth proportional to 2,987.23, 4,480.61 and 1,231.78 is: 1,847.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.23 : 4,480.61 = 1,231.78 : x
  2. Step 2: Convert to fraction form
    2,987.23/4,480.61 = 1,231.78/x
  3. Step 3: Cross multiply
    2,987.23x = 4,480.61 × 1,231.78
  4. Step 4: Simplify right side
    2,987.23x = 5,519,125.79
  5. Step 5: Solve for x
    x = 5,519,125.79/2,987.23
  6. Step 6: Final answer
    x = 1,847.57

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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.