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Finding the Fourth Proportional to 642,645.45, 886,850.82 and 356,184.03

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Solution

The fourth proportional to 642,645.45, 886,850.82 and 356,184.03 is: 491,534.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,645.45 : 886,850.82 = 356,184.03 : x
  2. Step 2: Convert to fraction form
    642,645.45/886,850.82 = 356,184.03/x
  3. Step 3: Cross multiply
    642,645.45x = 886,850.82 × 356,184.03
  4. Step 4: Simplify right side
    642,645.45x = 315,882,099,076.41
  5. Step 5: Solve for x
    x = 315,882,099,076.41/642,645.45
  6. Step 6: Final answer
    x = 491,534.02

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.