Home / 1,086.21-1,629.42-355.86

Finding the Fourth Proportional to 1,086.21, 1,629.42 and 355.86

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Solution

The fourth proportional to 1,086.21, 1,629.42 and 355.86 is: 533.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.21 : 1,629.42 = 355.86 : x
  2. Step 2: Convert to fraction form
    1,086.21/1,629.42 = 355.86/x
  3. Step 3: Cross multiply
    1,086.21x = 1,629.42 × 355.86
  4. Step 4: Simplify right side
    1,086.21x = 579,844.07
  5. Step 5: Solve for x
    x = 579,844.07/1,086.21
  6. Step 6: Final answer
    x = 533.82

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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.