Home / 2,786.65-4,179.96-1,143.20

Finding the Fourth Proportional to 2,786.65, 4,179.96 and 1,143.20

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Solution

The fourth proportional to 2,786.65, 4,179.96 and 1,143.20 is: 1,714.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786.65 : 4,179.96 = 1,143.20 : x
  2. Step 2: Convert to fraction form
    2,786.65/4,179.96 = 1,143.20/x
  3. Step 3: Cross multiply
    2,786.65x = 4,179.96 × 1,143.20
  4. Step 4: Simplify right side
    2,786.65x = 4,778,540.72
  5. Step 5: Solve for x
    x = 4,778,540.72/2,786.65
  6. Step 6: Final answer
    x = 1,714.80

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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.