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Finding the Fourth Proportional to 339,902.26, 509,394.10 and 129,425.38

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Solution

The fourth proportional to 339,902.26, 509,394.10 and 129,425.38 is: 193,963.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,902.26 : 509,394.10 = 129,425.38 : x
  2. Step 2: Convert to fraction form
    339,902.26/509,394.10 = 129,425.38/x
  3. Step 3: Cross multiply
    339,902.26x = 509,394.10 × 129,425.38
  4. Step 4: Simplify right side
    339,902.26x = 65,928,522,415.29
  5. Step 5: Solve for x
    x = 65,928,522,415.29/339,902.26
  6. Step 6: Final answer
    x = 193,963.18

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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.