Home / 1,086.32-1,629.48-355.90

Finding the Fourth Proportional to 1,086.32, 1,629.48 and 355.90

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Solution

The fourth proportional to 1,086.32, 1,629.48 and 355.90 is: 533.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.32 : 1,629.48 = 355.90 : x
  2. Step 2: Convert to fraction form
    1,086.32/1,629.48 = 355.90/x
  3. Step 3: Cross multiply
    1,086.32x = 1,629.48 × 355.90
  4. Step 4: Simplify right side
    1,086.32x = 579,931.93
  5. Step 5: Solve for x
    x = 579,931.93/1,086.32
  6. Step 6: Final answer
    x = 533.85

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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.