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Finding the Fourth Proportional to 619,185.43, 853,684.90 and 401,008.64

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Solution

The fourth proportional to 619,185.43, 853,684.90 and 401,008.64 is: 552,879.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,185.43 : 853,684.90 = 401,008.64 : x
  2. Step 2: Convert to fraction form
    619,185.43/853,684.90 = 401,008.64/x
  3. Step 3: Cross multiply
    619,185.43x = 853,684.90 × 401,008.64
  4. Step 4: Simplify right side
    619,185.43x = 342,335,017,722.26
  5. Step 5: Solve for x
    x = 342,335,017,722.26/619,185.43
  6. Step 6: Final answer
    x = 552,879.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.