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Finding the Fourth Proportional to 619,315.20, 854,668.80 and 377,611.20

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Solution

The fourth proportional to 619,315.20, 854,668.80 and 377,611.20 is: 521,111.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,315.20 : 854,668.80 = 377,611.20 : x
  2. Step 2: Convert to fraction form
    619,315.20/854,668.80 = 377,611.20/x
  3. Step 3: Cross multiply
    619,315.20x = 854,668.80 × 377,611.20
  4. Step 4: Simplify right side
    619,315.20x = 322,732,511,170.56
  5. Step 5: Solve for x
    x = 322,732,511,170.56/619,315.20
  6. Step 6: Final answer
    x = 521,111.88

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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.