Home / 2,722.12-4,080.38-1,078

Finding the Fourth Proportional to 2,722.12, 4,080.38 and 1,078

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Solution

The fourth proportional to 2,722.12, 4,080.38 and 1,078 is: 1,615.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,722.12 : 4,080.38 = 1,078 : x
  2. Step 2: Convert to fraction form
    2,722.12/4,080.38 = 1,078/x
  3. Step 3: Cross multiply
    2,722.12x = 4,080.38 × 1,078
  4. Step 4: Simplify right side
    2,722.12x = 4,398,649.64
  5. Step 5: Solve for x
    x = 4,398,649.64/2,722.12
  6. Step 6: Final answer
    x = 1,615.89

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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.