Home / 2,811.90-4,218.57-1,080.06

Finding the Fourth Proportional to 2,811.90, 4,218.57 and 1,080.06

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Solution

The fourth proportional to 2,811.90, 4,218.57 and 1,080.06 is: 1,620.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.90 : 4,218.57 = 1,080.06 : x
  2. Step 2: Convert to fraction form
    2,811.90/4,218.57 = 1,080.06/x
  3. Step 3: Cross multiply
    2,811.90x = 4,218.57 × 1,080.06
  4. Step 4: Simplify right side
    2,811.90x = 4,556,308.71
  5. Step 5: Solve for x
    x = 4,556,308.71/2,811.90
  6. Step 6: Final answer
    x = 1,620.37

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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.