Home / 1,080.20-1,619.22-386.44

Finding the Fourth Proportional to 1,080.20, 1,619.22 and 386.44

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Solution

The fourth proportional to 1,080.20, 1,619.22 and 386.44 is: 579.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.20 : 1,619.22 = 386.44 : x
  2. Step 2: Convert to fraction form
    1,080.20/1,619.22 = 386.44/x
  3. Step 3: Cross multiply
    1,080.20x = 1,619.22 × 386.44
  4. Step 4: Simplify right side
    1,080.20x = 625,731.38
  5. Step 5: Solve for x
    x = 625,731.38/1,080.20
  6. Step 6: Final answer
    x = 579.27

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1.5x scale

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.