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Finding the Fourth Proportional to 619,117.98, 854,020.82 and 389,311.47

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Solution

The fourth proportional to 619,117.98, 854,020.82 and 389,311.47 is: 537,022.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,117.98 : 854,020.82 = 389,311.47 : x
  2. Step 2: Convert to fraction form
    619,117.98/854,020.82 = 389,311.47/x
  3. Step 3: Cross multiply
    619,117.98x = 854,020.82 × 389,311.47
  4. Step 4: Simplify right side
    619,117.98x = 332,480,098,898.25
  5. Step 5: Solve for x
    x = 332,480,098,898.25/619,117.98
  6. Step 6: Final answer
    x = 537,022.20

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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.