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Finding the Fourth Proportional to 641,979.62, 962,967.11 and 192,698.54

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Solution

The fourth proportional to 641,979.62, 962,967.11 and 192,698.54 is: 289,047.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,979.62 : 962,967.11 = 192,698.54 : x
  2. Step 2: Convert to fraction form
    641,979.62/962,967.11 = 192,698.54/x
  3. Step 3: Cross multiply
    641,979.62x = 962,967.11 × 192,698.54
  4. Step 4: Simplify right side
    641,979.62x = 185,562,350,386.69
  5. Step 5: Solve for x
    x = 185,562,350,386.69/641,979.62
  6. Step 6: Final answer
    x = 289,047.11

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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.