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Finding the Fourth Proportional to 303,990.67, 419,499.80 and 166,163.40

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Solution

The fourth proportional to 303,990.67, 419,499.80 and 166,163.40 is: 229,301.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,990.67 : 419,499.80 = 166,163.40 : x
  2. Step 2: Convert to fraction form
    303,990.67/419,499.80 = 166,163.40/x
  3. Step 3: Cross multiply
    303,990.67x = 419,499.80 × 166,163.40
  4. Step 4: Simplify right side
    303,990.67x = 69,705,513,067.32
  5. Step 5: Solve for x
    x = 69,705,513,067.32/303,990.67
  6. Step 6: Final answer
    x = 229,301.49

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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.