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Finding the Fourth Proportional to 393,553.60, 543,054.10 and 223,791.37

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Solution

The fourth proportional to 393,553.60, 543,054.10 and 223,791.37 is: 308,803.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,553.60 : 543,054.10 = 223,791.37 : x
  2. Step 2: Convert to fraction form
    393,553.60/543,054.10 = 223,791.37/x
  3. Step 3: Cross multiply
    393,553.60x = 543,054.10 × 223,791.37
  4. Step 4: Simplify right side
    393,553.60x = 121,530,821,023.12
  5. Step 5: Solve for x
    x = 121,530,821,023.12/393,553.60
  6. Step 6: Final answer
    x = 308,803.73

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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.