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Finding the Fourth Proportional to 511,776.50, 768,329.97 and 393,530.87

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Solution

The fourth proportional to 511,776.50, 768,329.97 and 393,530.87 is: 590,807.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,776.50 : 768,329.97 = 393,530.87 : x
  2. Step 2: Convert to fraction form
    511,776.50/768,329.97 = 393,530.87/x
  3. Step 3: Cross multiply
    511,776.50x = 768,329.97 × 393,530.87
  4. Step 4: Simplify right side
    511,776.50x = 302,361,559,573.52
  5. Step 5: Solve for x
    x = 302,361,559,573.52/511,776.50
  6. Step 6: Final answer
    x = 590,807.83

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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.