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Finding the Fourth Proportional to 443,998.80, 665,998.20 and 392,677.20

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Solution

The fourth proportional to 443,998.80, 665,998.20 and 392,677.20 is: 589,015.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,998.80 : 665,998.20 = 392,677.20 : x
  2. Step 2: Convert to fraction form
    443,998.80/665,998.20 = 392,677.20/x
  3. Step 3: Cross multiply
    443,998.80x = 665,998.20 × 392,677.20
  4. Step 4: Simplify right side
    443,998.80x = 261,522,308,381.04
  5. Step 5: Solve for x
    x = 261,522,308,381.04/443,998.80
  6. Step 6: Final answer
    x = 589,015.80

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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.