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Finding the Fourth Proportional to 619,228.96, 854,173.06 and 389,421.74

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Solution

The fourth proportional to 619,228.96, 854,173.06 and 389,421.74 is: 537,173.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,228.96 : 854,173.06 = 389,421.74 : x
  2. Step 2: Convert to fraction form
    619,228.96/854,173.06 = 389,421.74/x
  3. Step 3: Cross multiply
    619,228.96x = 854,173.06 × 389,421.74
  4. Step 4: Simplify right side
    619,228.96x = 332,633,559,286.32
  5. Step 5: Solve for x
    x = 332,633,559,286.32/619,228.96
  6. Step 6: Final answer
    x = 537,173.78

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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.