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Finding the Fourth Proportional to 638,447.75, 955,306.05 and 511,703.58

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Solution

The fourth proportional to 638,447.75, 955,306.05 and 511,703.58 is: 765,659.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,447.75 : 955,306.05 = 511,703.58 : x
  2. Step 2: Convert to fraction form
    638,447.75/955,306.05 = 511,703.58/x
  3. Step 3: Cross multiply
    638,447.75x = 955,306.05 × 511,703.58
  4. Step 4: Simplify right side
    638,447.75x = 488,833,525,780.66
  5. Step 5: Solve for x
    x = 488,833,525,780.66/638,447.75
  6. Step 6: Final answer
    x = 765,659.41

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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.