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Finding the Fourth Proportional to 1,979.60, 2,976.60 and 1,662.80

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Solution

The fourth proportional to 1,979.60, 2,976.60 and 1,662.80 is: 2,500.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.60 : 2,976.60 = 1,662.80 : x
  2. Step 2: Convert to fraction form
    1,979.60/2,976.60 = 1,662.80/x
  3. Step 3: Cross multiply
    1,979.60x = 2,976.60 × 1,662.80
  4. Step 4: Simplify right side
    1,979.60x = 4,949,490.48
  5. Step 5: Solve for x
    x = 4,949,490.48/1,979.60
  6. Step 6: Final answer
    x = 2,500.25

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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.