Home / 1,979.03-2,968.52-680.47

Finding the Fourth Proportional to 1,979.03, 2,968.52 and 680.47

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Solution

The fourth proportional to 1,979.03, 2,968.52 and 680.47 is: 1,020.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.03 : 2,968.52 = 680.47 : x
  2. Step 2: Convert to fraction form
    1,979.03/2,968.52 = 680.47/x
  3. Step 3: Cross multiply
    1,979.03x = 2,968.52 × 680.47
  4. Step 4: Simplify right side
    1,979.03x = 2,019,977.98
  5. Step 5: Solve for x
    x = 2,019,977.98/1,979.03
  6. Step 6: Final answer
    x = 1,020.69

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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.