Home / 1,485.12-2,049.39-855.75

Finding the Fourth Proportional to 1,485.12, 2,049.39 and 855.75

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Solution

The fourth proportional to 1,485.12, 2,049.39 and 855.75 is: 1,180.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.12 : 2,049.39 = 855.75 : x
  2. Step 2: Convert to fraction form
    1,485.12/2,049.39 = 855.75/x
  3. Step 3: Cross multiply
    1,485.12x = 2,049.39 × 855.75
  4. Step 4: Simplify right side
    1,485.12x = 1,753,765.49
  5. Step 5: Solve for x
    x = 1,753,765.49/1,485.12
  6. Step 6: Final answer
    x = 1,180.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.