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Finding the Fourth Proportional to 494,563.80, 739,877.40 and 428,735.10

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Solution

The fourth proportional to 494,563.80, 739,877.40 and 428,735.10 is: 641,396.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,563.80 : 739,877.40 = 428,735.10 : x
  2. Step 2: Convert to fraction form
    494,563.80/739,877.40 = 428,735.10/x
  3. Step 3: Cross multiply
    494,563.80x = 739,877.40 × 428,735.10
  4. Step 4: Simplify right side
    494,563.80x = 317,211,411,076.74
  5. Step 5: Solve for x
    x = 317,211,411,076.74/494,563.80
  6. Step 6: Final answer
    x = 641,396.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.