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Finding the Fourth Proportional to 639,249.96, 958,200.79 and 212,671.53

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Solution

The fourth proportional to 639,249.96, 958,200.79 and 212,671.53 is: 318,783.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,249.96 : 958,200.79 = 212,671.53 : x
  2. Step 2: Convert to fraction form
    639,249.96/958,200.79 = 212,671.53/x
  3. Step 3: Cross multiply
    639,249.96x = 958,200.79 × 212,671.53
  4. Step 4: Simplify right side
    639,249.96x = 203,782,028,056.51
  5. Step 5: Solve for x
    x = 203,782,028,056.51/639,249.96
  6. Step 6: Final answer
    x = 318,783.01

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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.