Home / 494,558.30-739,869.15-428,729.60

Finding the Fourth Proportional to 494,558.30, 739,869.15 and 428,729.60

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Solution

The fourth proportional to 494,558.30, 739,869.15 and 428,729.60 is: 641,388.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,558.30 : 739,869.15 = 428,729.60 : x
  2. Step 2: Convert to fraction form
    494,558.30/739,869.15 = 428,729.60/x
  3. Step 3: Cross multiply
    494,558.30x = 739,869.15 × 428,729.60
  4. Step 4: Simplify right side
    494,558.30x = 317,203,804,731.84
  5. Step 5: Solve for x
    x = 317,203,804,731.84/494,558.30
  6. Step 6: Final answer
    x = 641,388.09

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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.