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Finding the Fourth Proportional to 980.08, 1,351.80 and 696.04

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Solution

The fourth proportional to 980.08, 1,351.80 and 696.04 is: 960.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.08 : 1,351.80 = 696.04 : x
  2. Step 2: Convert to fraction form
    980.08/1,351.80 = 696.04/x
  3. Step 3: Cross multiply
    980.08x = 1,351.80 × 696.04
  4. Step 4: Simplify right side
    980.08x = 940,906.87
  5. Step 5: Solve for x
    x = 940,906.87/980.08
  6. Step 6: Final answer
    x = 960.03

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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.