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Finding the Fourth Proportional to 511,989.60, 768,368.40 and 262,543.20

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Solution

The fourth proportional to 511,989.60, 768,368.40 and 262,543.20 is: 394,011.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,989.60 : 768,368.40 = 262,543.20 : x
  2. Step 2: Convert to fraction form
    511,989.60/768,368.40 = 262,543.20/x
  3. Step 3: Cross multiply
    511,989.60x = 768,368.40 × 262,543.20
  4. Step 4: Simplify right side
    511,989.60x = 201,729,898,514.88
  5. Step 5: Solve for x
    x = 201,729,898,514.88/511,989.60
  6. Step 6: Final answer
    x = 394,011.71

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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.