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Finding the Fourth Proportional to 443,171.20, 664,756.80 and 127,638.40

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Solution

The fourth proportional to 443,171.20, 664,756.80 and 127,638.40 is: 191,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,171.20 : 664,756.80 = 127,638.40 : x
  2. Step 2: Convert to fraction form
    443,171.20/664,756.80 = 127,638.40/x
  3. Step 3: Cross multiply
    443,171.20x = 664,756.80 × 127,638.40
  4. Step 4: Simplify right side
    443,171.20x = 84,848,494,341.12
  5. Step 5: Solve for x
    x = 84,848,494,341.12/443,171.20
  6. Step 6: Final answer
    x = 191,457.60

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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.