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Finding the Fourth Proportional to 620,556.80, 929,960.40 and 383,194.40

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Solution

The fourth proportional to 620,556.80, 929,960.40 and 383,194.40 is: 574,251.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,556.80 : 929,960.40 = 383,194.40 : x
  2. Step 2: Convert to fraction form
    620,556.80/929,960.40 = 383,194.40/x
  3. Step 3: Cross multiply
    620,556.80x = 929,960.40 × 383,194.40
  4. Step 4: Simplify right side
    620,556.80x = 356,355,617,501.76
  5. Step 5: Solve for x
    x = 356,355,617,501.76/620,556.80
  6. Step 6: Final answer
    x = 574,251.41

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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.