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Finding the Fourth Proportional to 445,528.20, 668,221.20 and 129,911.28

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Solution

The fourth proportional to 445,528.20, 668,221.20 and 129,911.28 is: 194,846.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,528.20 : 668,221.20 = 129,911.28 : x
  2. Step 2: Convert to fraction form
    445,528.20/668,221.20 = 129,911.28/x
  3. Step 3: Cross multiply
    445,528.20x = 668,221.20 × 129,911.28
  4. Step 4: Simplify right side
    445,528.20x = 86,809,471,415.14
  5. Step 5: Solve for x
    x = 86,809,471,415.14/445,528.20
  6. Step 6: Final answer
    x = 194,846.19

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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.