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Finding the Fourth Proportional to 279,328.11, 419,016.86 and 79,644.21

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Solution

The fourth proportional to 279,328.11, 419,016.86 and 79,644.21 is: 119,473.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,328.11 : 419,016.86 = 79,644.21 : x
  2. Step 2: Convert to fraction form
    279,328.11/419,016.86 = 79,644.21/x
  3. Step 3: Cross multiply
    279,328.11x = 419,016.86 × 79,644.21
  4. Step 4: Simplify right side
    279,328.11x = 33,372,266,791.38
  5. Step 5: Solve for x
    x = 33,372,266,791.38/279,328.11
  6. Step 6: Final answer
    x = 119,473.36

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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.