Home / 1,329.24-1,992.14-680.20

Finding the Fourth Proportional to 1,329.24, 1,992.14 and 680.20

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Solution

The fourth proportional to 1,329.24, 1,992.14 and 680.20 is: 1,019.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.24 : 1,992.14 = 680.20 : x
  2. Step 2: Convert to fraction form
    1,329.24/1,992.14 = 680.20/x
  3. Step 3: Cross multiply
    1,329.24x = 1,992.14 × 680.20
  4. Step 4: Simplify right side
    1,329.24x = 1,355,053.63
  5. Step 5: Solve for x
    x = 1,355,053.63/1,329.24
  6. Step 6: Final answer
    x = 1,019.42

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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.