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Finding the Fourth Proportional to 519,831, 717,368.94 and 281,367

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Solution

The fourth proportional to 519,831, 717,368.94 and 281,367 is: 388,287.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,831 : 717,368.94 = 281,367 : x
  2. Step 2: Convert to fraction form
    519,831/717,368.94 = 281,367/x
  3. Step 3: Cross multiply
    519,831x = 717,368.94 × 281,367
  4. Step 4: Simplify right side
    519,831x = 201,843,946,540.98
  5. Step 5: Solve for x
    x = 201,843,946,540.98/519,831
  6. Step 6: Final answer
    x = 388,287.63

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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.