Home / 1,979.50-2,969.43-680.98

Finding the Fourth Proportional to 1,979.50, 2,969.43 and 680.98

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Solution

The fourth proportional to 1,979.50, 2,969.43 and 680.98 is: 1,021.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.50 : 2,969.43 = 680.98 : x
  2. Step 2: Convert to fraction form
    1,979.50/2,969.43 = 680.98/x
  3. Step 3: Cross multiply
    1,979.50x = 2,969.43 × 680.98
  4. Step 4: Simplify right side
    1,979.50x = 2,022,122.44
  5. Step 5: Solve for x
    x = 2,022,122.44/1,979.50
  6. Step 6: Final answer
    x = 1,021.53

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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.