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Finding the Fourth Proportional to 318,989.76, 440,213.80 and 196,435.75

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Solution

The fourth proportional to 318,989.76, 440,213.80 and 196,435.75 is: 271,086.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,989.76 : 440,213.80 = 196,435.75 : x
  2. Step 2: Convert to fraction form
    318,989.76/440,213.80 = 196,435.75/x
  3. Step 3: Cross multiply
    318,989.76x = 440,213.80 × 196,435.75
  4. Step 4: Simplify right side
    318,989.76x = 86,473,727,472.26
  5. Step 5: Solve for x
    x = 86,473,727,472.26/318,989.76
  6. Step 6: Final answer
    x = 271,086.22

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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.