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Finding the Fourth Proportional to 639,568.64, 959,185.78 and 190,168.48

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Solution

The fourth proportional to 639,568.64, 959,185.78 and 190,168.48 is: 285,203.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,568.64 : 959,185.78 = 190,168.48 : x
  2. Step 2: Convert to fraction form
    639,568.64/959,185.78 = 190,168.48/x
  3. Step 3: Cross multiply
    639,568.64x = 959,185.78 × 190,168.48
  4. Step 4: Simplify right side
    639,568.64x = 182,406,901,820.21
  5. Step 5: Solve for x
    x = 182,406,901,820.21/639,568.64
  6. Step 6: Final answer
    x = 285,203.01

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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.