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Finding the Fourth Proportional to 512,379.24, 768,571.11 and 212,859.57

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Solution

The fourth proportional to 512,379.24, 768,571.11 and 212,859.57 is: 319,290.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,379.24 : 768,571.11 = 212,859.57 : x
  2. Step 2: Convert to fraction form
    512,379.24/768,571.11 = 212,859.57/x
  3. Step 3: Cross multiply
    512,379.24x = 768,571.11 × 212,859.57
  4. Step 4: Simplify right side
    512,379.24x = 163,597,715,989.02
  5. Step 5: Solve for x
    x = 163,597,715,989.02/512,379.24
  6. Step 6: Final answer
    x = 319,290.29

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1.5x scale

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.