Home / 1,328.24-1,992.38-403.80

Finding the Fourth Proportional to 1,328.24, 1,992.38 and 403.80

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Solution

The fourth proportional to 1,328.24, 1,992.38 and 403.80 is: 605.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.24 : 1,992.38 = 403.80 : x
  2. Step 2: Convert to fraction form
    1,328.24/1,992.38 = 403.80/x
  3. Step 3: Cross multiply
    1,328.24x = 1,992.38 × 403.80
  4. Step 4: Simplify right side
    1,328.24x = 804,523.04
  5. Step 5: Solve for x
    x = 804,523.04/1,328.24
  6. Step 6: Final answer
    x = 605.71

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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.