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Finding the Fourth Proportional to 308,972.75, 426,308.87 and 188,112.65

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Solution

The fourth proportional to 308,972.75, 426,308.87 and 188,112.65 is: 259,550.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,972.75 : 426,308.87 = 188,112.65 : x
  2. Step 2: Convert to fraction form
    308,972.75/426,308.87 = 188,112.65/x
  3. Step 3: Cross multiply
    308,972.75x = 426,308.87 × 188,112.65
  4. Step 4: Simplify right side
    308,972.75x = 80,194,089,592.94
  5. Step 5: Solve for x
    x = 80,194,089,592.94/308,972.75
  6. Step 6: Final answer
    x = 259,550.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.