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Finding the Fourth Proportional to 919,791.99, 1,379,694.13 and 320,750.82

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Solution

The fourth proportional to 919,791.99, 1,379,694.13 and 320,750.82 is: 481,128.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,791.99 : 1,379,694.13 = 320,750.82 : x
  2. Step 2: Convert to fraction form
    919,791.99/1,379,694.13 = 320,750.82/x
  3. Step 3: Cross multiply
    919,791.99x = 1,379,694.13 × 320,750.82
  4. Step 4: Simplify right side
    919,791.99x = 442,538,022,744.81
  5. Step 5: Solve for x
    x = 442,538,022,744.81/919,791.99
  6. Step 6: Final answer
    x = 481,128.37

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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.