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Finding the Fourth Proportional to 339,654.99, 509,285.69 and 139,749.56

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Solution

The fourth proportional to 339,654.99, 509,285.69 and 139,749.56 is: 209,543.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,654.99 : 509,285.69 = 139,749.56 : x
  2. Step 2: Convert to fraction form
    339,654.99/509,285.69 = 139,749.56/x
  3. Step 3: Cross multiply
    339,654.99x = 509,285.69 × 139,749.56
  4. Step 4: Simplify right side
    339,654.99x = 71,172,451,091.80
  5. Step 5: Solve for x
    x = 71,172,451,091.80/339,654.99
  6. Step 6: Final answer
    x = 209,543.37

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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.