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Finding the Fourth Proportional to 636,360.05, 878,193.50 and 345,991.15

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Solution

The fourth proportional to 636,360.05, 878,193.50 and 345,991.15 is: 477,476.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,360.05 : 878,193.50 = 345,991.15 : x
  2. Step 2: Convert to fraction form
    636,360.05/878,193.50 = 345,991.15/x
  3. Step 3: Cross multiply
    636,360.05x = 878,193.50 × 345,991.15
  4. Step 4: Simplify right side
    636,360.05x = 303,847,173,415.47
  5. Step 5: Solve for x
    x = 303,847,173,415.47/636,360.05
  6. Step 6: Final answer
    x = 477,476.82

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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.