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Finding the Fourth Proportional to 800,673, 1,104,942.78 and 438,128.62

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Solution

The fourth proportional to 800,673, 1,104,942.78 and 438,128.62 is: 604,625.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,673 : 1,104,942.78 = 438,128.62 : x
  2. Step 2: Convert to fraction form
    800,673/1,104,942.78 = 438,128.62/x
  3. Step 3: Cross multiply
    800,673x = 1,104,942.78 × 438,128.62
  4. Step 4: Simplify right side
    800,673x = 484,107,055,380.36
  5. Step 5: Solve for x
    x = 484,107,055,380.36/800,673
  6. Step 6: Final answer
    x = 604,625.18

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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.