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Finding the Fourth Proportional to 443,354.20, 665,117.70 and 190,634.20

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Solution

The fourth proportional to 443,354.20, 665,117.70 and 190,634.20 is: 285,988.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,354.20 : 665,117.70 = 190,634.20 : x
  2. Step 2: Convert to fraction form
    443,354.20/665,117.70 = 190,634.20/x
  3. Step 3: Cross multiply
    443,354.20x = 665,117.70 × 190,634.20
  4. Step 4: Simplify right side
    443,354.20x = 126,794,180,645.34
  5. Step 5: Solve for x
    x = 126,794,180,645.34/443,354.20
  6. Step 6: Final answer
    x = 285,988.45

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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.