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Finding the Fourth Proportional to 639,256.56, 958,635.52 and 239,679.60

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Solution

The fourth proportional to 639,256.56, 958,635.52 and 239,679.60 is: 359,425.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,256.56 : 958,635.52 = 239,679.60 : x
  2. Step 2: Convert to fraction form
    639,256.56/958,635.52 = 239,679.60/x
  3. Step 3: Cross multiply
    639,256.56x = 958,635.52 × 239,679.60
  4. Step 4: Simplify right side
    639,256.56x = 229,765,377,979.39
  5. Step 5: Solve for x
    x = 229,765,377,979.39/639,256.56
  6. Step 6: Final answer
    x = 359,425.92

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Double scale
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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.