Home / 2,811.40-4,217.32-1,080.04

Finding the Fourth Proportional to 2,811.40, 4,217.32 and 1,080.04

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Solution

The fourth proportional to 2,811.40, 4,217.32 and 1,080.04 is: 1,620.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.40 : 4,217.32 = 1,080.04 : x
  2. Step 2: Convert to fraction form
    2,811.40/4,217.32 = 1,080.04/x
  3. Step 3: Cross multiply
    2,811.40x = 4,217.32 × 1,080.04
  4. Step 4: Simplify right side
    2,811.40x = 4,554,874.29
  5. Step 5: Solve for x
    x = 4,554,874.29/2,811.40
  6. Step 6: Final answer
    x = 1,620.14

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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.