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Finding the Fourth Proportional to 617,763.20, 926,644.80 and 218,400.80

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Solution

The fourth proportional to 617,763.20, 926,644.80 and 218,400.80 is: 327,601.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,763.20 : 926,644.80 = 218,400.80 : x
  2. Step 2: Convert to fraction form
    617,763.20/926,644.80 = 218,400.80/x
  3. Step 3: Cross multiply
    617,763.20x = 926,644.80 × 218,400.80
  4. Step 4: Simplify right side
    617,763.20x = 202,379,965,635.84
  5. Step 5: Solve for x
    x = 202,379,965,635.84/617,763.20
  6. Step 6: Final answer
    x = 327,601.20

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Similar ratio
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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.