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Finding the Fourth Proportional to 339,969.70, 509,954.55 and 279,835.30

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Solution

The fourth proportional to 339,969.70, 509,954.55 and 279,835.30 is: 419,752.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,969.70 : 509,954.55 = 279,835.30 : x
  2. Step 2: Convert to fraction form
    339,969.70/509,954.55 = 279,835.30/x
  3. Step 3: Cross multiply
    339,969.70x = 509,954.55 × 279,835.30
  4. Step 4: Simplify right side
    339,969.70x = 142,703,284,485.62
  5. Step 5: Solve for x
    x = 142,703,284,485.62/339,969.70
  6. Step 6: Final answer
    x = 419,752.95

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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.