Home / 1,086.36-1,629.19-355.78

Finding the Fourth Proportional to 1,086.36, 1,629.19 and 355.78

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Solution

The fourth proportional to 1,086.36, 1,629.19 and 355.78 is: 533.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.36 : 1,629.19 = 355.78 : x
  2. Step 2: Convert to fraction form
    1,086.36/1,629.19 = 355.78/x
  3. Step 3: Cross multiply
    1,086.36x = 1,629.19 × 355.78
  4. Step 4: Simplify right side
    1,086.36x = 579,633.22
  5. Step 5: Solve for x
    x = 579,633.22/1,086.36
  6. Step 6: Final answer
    x = 533.56

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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.