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Finding the Fourth Proportional to 639,808.76, 959,920.41 and 190,533.35

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Solution

The fourth proportional to 639,808.76, 959,920.41 and 190,533.35 is: 285,861.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,808.76 : 959,920.41 = 190,533.35 : x
  2. Step 2: Convert to fraction form
    639,808.76/959,920.41 = 190,533.35/x
  3. Step 3: Cross multiply
    639,808.76x = 959,920.41 × 190,533.35
  4. Step 4: Simplify right side
    639,808.76x = 182,896,851,450.67
  5. Step 5: Solve for x
    x = 182,896,851,450.67/639,808.76
  6. Step 6: Final answer
    x = 285,861.75

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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.