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Finding the Fourth Proportional to 512,868.54, 768,615.13 and 399,153.65

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Solution

The fourth proportional to 512,868.54, 768,615.13 and 399,153.65 is: 598,195.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,868.54 : 768,615.13 = 399,153.65 : x
  2. Step 2: Convert to fraction form
    512,868.54/768,615.13 = 399,153.65/x
  3. Step 3: Cross multiply
    512,868.54x = 768,615.13 × 399,153.65
  4. Step 4: Simplify right side
    512,868.54x = 306,795,534,524.94
  5. Step 5: Solve for x
    x = 306,795,534,524.94/512,868.54
  6. Step 6: Final answer
    x = 598,195.28

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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.