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Finding the Fourth Proportional to 639,702.30, 959,553.42 and 190,429.62

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Solution

The fourth proportional to 639,702.30, 959,553.42 and 190,429.62 is: 285,644.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,702.30 : 959,553.42 = 190,429.62 : x
  2. Step 2: Convert to fraction form
    639,702.30/959,553.42 = 190,429.62/x
  3. Step 3: Cross multiply
    639,702.30x = 959,553.42 × 190,429.62
  4. Step 4: Simplify right side
    639,702.30x = 182,727,393,140.30
  5. Step 5: Solve for x
    x = 182,727,393,140.30/639,702.30
  6. Step 6: Final answer
    x = 285,644.42

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Double scale
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Similar ratio
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1.5x scale

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.