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Finding the Fourth Proportional to 405,729.40, 608,651.70 and 125,217.40

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Solution

The fourth proportional to 405,729.40, 608,651.70 and 125,217.40 is: 187,843.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,729.40 : 608,651.70 = 125,217.40 : x
  2. Step 2: Convert to fraction form
    405,729.40/608,651.70 = 125,217.40/x
  3. Step 3: Cross multiply
    405,729.40x = 608,651.70 × 125,217.40
  4. Step 4: Simplify right side
    405,729.40x = 76,213,783,379.58
  5. Step 5: Solve for x
    x = 76,213,783,379.58/405,729.40
  6. Step 6: Final answer
    x = 187,843.88

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1.5x scale

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.