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Finding the Fourth Proportional to 980.20, 1,468.70 and 922.60

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Solution

The fourth proportional to 980.20, 1,468.70 and 922.60 is: 1,382.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.20 : 1,468.70 = 922.60 : x
  2. Step 2: Convert to fraction form
    980.20/1,468.70 = 922.60/x
  3. Step 3: Cross multiply
    980.20x = 1,468.70 × 922.60
  4. Step 4: Simplify right side
    980.20x = 1,355,022.62
  5. Step 5: Solve for x
    x = 1,355,022.62/980.20
  6. Step 6: Final answer
    x = 1,382.39

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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.