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Finding the Fourth Proportional to 639,906.69, 960,017.91 and 190,625.81

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Solution

The fourth proportional to 639,906.69, 960,017.91 and 190,625.81 is: 285,985.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,906.69 : 960,017.91 = 190,625.81 : x
  2. Step 2: Convert to fraction form
    639,906.69/960,017.91 = 190,625.81/x
  3. Step 3: Cross multiply
    639,906.69x = 960,017.91 × 190,625.81
  4. Step 4: Simplify right side
    639,906.69x = 183,004,191,708.26
  5. Step 5: Solve for x
    x = 183,004,191,708.26/639,906.69
  6. Step 6: Final answer
    x = 285,985.75

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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.