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Finding the Third Proportional to 90,816 and 197,980

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Solution

The third proportional to 90,816 and 197,980 is: 431,598.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,816 : 197,980 = 197,980 : x
  2. Step 2: Convert to fraction form
    90,816/197,980 = 197,980/x
  3. Step 3: Cross multiply
    90,816x = 197,980 × 197,980
  4. Step 4: Simplify right side
    90,816x = 39,196,080,400
  5. Step 5: Solve for x
    x = 39,196,080,400/90,816
  6. Step 6: Final answer
    x = 431,598.84

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.