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Finding the Fourth Proportional to 550,406.94, 759,558.63 and 305,389.43

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Solution

The fourth proportional to 550,406.94, 759,558.63 and 305,389.43 is: 421,435.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,406.94 : 759,558.63 = 305,389.43 : x
  2. Step 2: Convert to fraction form
    550,406.94/759,558.63 = 305,389.43/x
  3. Step 3: Cross multiply
    550,406.94x = 759,558.63 × 305,389.43
  4. Step 4: Simplify right side
    550,406.94x = 231,961,177,067.28
  5. Step 5: Solve for x
    x = 231,961,177,067.28/550,406.94
  6. Step 6: Final answer
    x = 421,435.78

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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.