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Finding the Fourth Proportional to 339,974.70, 509,962.05 and 279,840.30

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Solution

The fourth proportional to 339,974.70, 509,962.05 and 279,840.30 is: 419,760.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,974.70 : 509,962.05 = 279,840.30 : x
  2. Step 2: Convert to fraction form
    339,974.70/509,962.05 = 279,840.30/x
  3. Step 3: Cross multiply
    339,974.70x = 509,962.05 × 279,840.30
  4. Step 4: Simplify right side
    339,974.70x = 142,707,933,060.62
  5. Step 5: Solve for x
    x = 142,707,933,060.62/339,974.70
  6. Step 6: Final answer
    x = 419,760.45

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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.