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Finding the Fourth Proportional to 539,763.20, 809,644.80 and 165,785.60

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Solution

The fourth proportional to 539,763.20, 809,644.80 and 165,785.60 is: 248,678.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,763.20 : 809,644.80 = 165,785.60 : x
  2. Step 2: Convert to fraction form
    539,763.20/809,644.80 = 165,785.60/x
  3. Step 3: Cross multiply
    539,763.20x = 809,644.80 × 165,785.60
  4. Step 4: Simplify right side
    539,763.20x = 134,227,448,954.88
  5. Step 5: Solve for x
    x = 134,227,448,954.88/539,763.20
  6. Step 6: Final answer
    x = 248,678.40

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Double scale
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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.