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Finding the Fourth Proportional to 339,910.65, 509,914.49 and 126,660.38

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Solution

The fourth proportional to 339,910.65, 509,914.49 and 126,660.38 is: 190,008.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,910.65 : 509,914.49 = 126,660.38 : x
  2. Step 2: Convert to fraction form
    339,910.65/509,914.49 = 126,660.38/x
  3. Step 3: Cross multiply
    339,910.65x = 509,914.49 × 126,660.38
  4. Step 4: Simplify right side
    339,910.65x = 64,585,959,888.03
  5. Step 5: Solve for x
    x = 64,585,959,888.03/339,910.65
  6. Step 6: Final answer
    x = 190,008.64

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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.