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Finding the Fourth Proportional to 640,958.90, 961,135.37 and 191,522.84

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Solution

The fourth proportional to 640,958.90, 961,135.37 and 191,522.84 is: 287,193.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,958.90 : 961,135.37 = 191,522.84 : x
  2. Step 2: Convert to fraction form
    640,958.90/961,135.37 = 191,522.84/x
  3. Step 3: Cross multiply
    640,958.90x = 961,135.37 × 191,522.84
  4. Step 4: Simplify right side
    640,958.90x = 184,079,374,729.24
  5. Step 5: Solve for x
    x = 184,079,374,729.24/640,958.90
  6. Step 6: Final answer
    x = 287,193.73

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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.