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Finding the Fourth Proportional to 519,975.69, 717,571.20 and 305,119.34

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Solution

The fourth proportional to 519,975.69, 717,571.20 and 305,119.34 is: 421,067.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,975.69 : 717,571.20 = 305,119.34 : x
  2. Step 2: Convert to fraction form
    519,975.69/717,571.20 = 305,119.34/x
  3. Step 3: Cross multiply
    519,975.69x = 717,571.20 × 305,119.34
  4. Step 4: Simplify right side
    519,975.69x = 218,944,847,359.15
  5. Step 5: Solve for x
    x = 218,944,847,359.15/519,975.69
  6. Step 6: Final answer
    x = 421,067.47

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1.5x scale

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.