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Finding the Fourth Proportional to 619,115.65, 854,017.61 and 389,309.23

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Solution

The fourth proportional to 619,115.65, 854,017.61 and 389,309.23 is: 537,019.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,115.65 : 854,017.61 = 389,309.23 : x
  2. Step 2: Convert to fraction form
    619,115.65/854,017.61 = 389,309.23/x
  3. Step 3: Cross multiply
    619,115.65x = 854,017.61 × 389,309.23
  4. Step 4: Simplify right side
    619,115.65x = 332,476,938,155.54
  5. Step 5: Solve for x
    x = 332,476,938,155.54/619,115.65
  6. Step 6: Final answer
    x = 537,019.11

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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.