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Finding the Fourth Proportional to 483,661.32, 725,491.11 and 128,675.34

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Solution

The fourth proportional to 483,661.32, 725,491.11 and 128,675.34 is: 193,012.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,661.32 : 725,491.11 = 128,675.34 : x
  2. Step 2: Convert to fraction form
    483,661.32/725,491.11 = 128,675.34/x
  3. Step 3: Cross multiply
    483,661.32x = 725,491.11 × 128,675.34
  4. Step 4: Simplify right side
    483,661.32x = 93,352,815,246.23
  5. Step 5: Solve for x
    x = 93,352,815,246.23/483,661.32
  6. Step 6: Final answer
    x = 193,012.78

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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.