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Finding the Fourth Proportional to 339,737.07, 509,231.94 and 139,948.50

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Solution

The fourth proportional to 339,737.07, 509,231.94 and 139,948.50 is: 209,768.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,737.07 : 509,231.94 = 139,948.50 : x
  2. Step 2: Convert to fraction form
    339,737.07/509,231.94 = 139,948.50/x
  3. Step 3: Cross multiply
    339,737.07x = 509,231.94 × 139,948.50
  4. Step 4: Simplify right side
    339,737.07x = 71,266,246,155.09
  5. Step 5: Solve for x
    x = 71,266,246,155.09/339,737.07
  6. Step 6: Final answer
    x = 209,768.83

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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.