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Finding the Fourth Proportional to 578,765.90, 866,982.45 and 389,809.10

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Solution

The fourth proportional to 578,765.90, 866,982.45 and 389,809.10 is: 583,928.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,765.90 : 866,982.45 = 389,809.10 : x
  2. Step 2: Convert to fraction form
    578,765.90/866,982.45 = 389,809.10/x
  3. Step 3: Cross multiply
    578,765.90x = 866,982.45 × 389,809.10
  4. Step 4: Simplify right side
    578,765.90x = 337,957,648,550.30
  5. Step 5: Solve for x
    x = 337,957,648,550.30/578,765.90
  6. Step 6: Final answer
    x = 583,928.06

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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.