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Finding the Fourth Proportional to 494,676.01, 681,908.73 and 387,059.21

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Solution

The fourth proportional to 494,676.01, 681,908.73 and 387,059.21 is: 533,559.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,676.01 : 681,908.73 = 387,059.21 : x
  2. Step 2: Convert to fraction form
    494,676.01/681,908.73 = 387,059.21/x
  3. Step 3: Cross multiply
    494,676.01x = 681,908.73 × 387,059.21
  4. Step 4: Simplify right side
    494,676.01x = 263,939,052,022.05
  5. Step 5: Solve for x
    x = 263,939,052,022.05/494,676.01
  6. Step 6: Final answer
    x = 533,559.43

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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.