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Finding the Fourth Proportional to 451,553.99, 622,633.74 and 287,991.72

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Solution

The fourth proportional to 451,553.99, 622,633.74 and 287,991.72 is: 397,102.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,553.99 : 622,633.74 = 287,991.72 : x
  2. Step 2: Convert to fraction form
    451,553.99/622,633.74 = 287,991.72/x
  3. Step 3: Cross multiply
    451,553.99x = 622,633.74 × 287,991.72
  4. Step 4: Simplify right side
    451,553.99x = 179,313,360,632.66
  5. Step 5: Solve for x
    x = 179,313,360,632.66/451,553.99
  6. Step 6: Final answer
    x = 397,102.81

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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.