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Finding the Fourth Proportional to 413,842.40, 620,871.60 and 133,366.40

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Solution

The fourth proportional to 413,842.40, 620,871.60 and 133,366.40 is: 200,084.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,842.40 : 620,871.60 = 133,366.40 : x
  2. Step 2: Convert to fraction form
    413,842.40/620,871.60 = 133,366.40/x
  3. Step 3: Cross multiply
    413,842.40x = 620,871.60 × 133,366.40
  4. Step 4: Simplify right side
    413,842.40x = 82,803,410,154.24
  5. Step 5: Solve for x
    x = 82,803,410,154.24/413,842.40
  6. Step 6: Final answer
    x = 200,084.40

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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.