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Finding the Fourth Proportional to 660,589.68, 990,523.92 and 198,900.31

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Solution

The fourth proportional to 660,589.68, 990,523.92 and 198,900.31 is: 298,241.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,589.68 : 990,523.92 = 198,900.31 : x
  2. Step 2: Convert to fraction form
    660,589.68/990,523.92 = 198,900.31/x
  3. Step 3: Cross multiply
    660,589.68x = 990,523.92 × 198,900.31
  4. Step 4: Simplify right side
    660,589.68x = 197,015,511,528.23
  5. Step 5: Solve for x
    x = 197,015,511,528.23/660,589.68
  6. Step 6: Final answer
    x = 298,241.89

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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.