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Finding the Fourth Proportional to 519,287.20, 778,930.80 and 203,754.40

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Solution

The fourth proportional to 519,287.20, 778,930.80 and 203,754.40 is: 305,631.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,287.20 : 778,930.80 = 203,754.40 : x
  2. Step 2: Convert to fraction form
    519,287.20/778,930.80 = 203,754.40/x
  3. Step 3: Cross multiply
    519,287.20x = 778,930.80 × 203,754.40
  4. Step 4: Simplify right side
    519,287.20x = 158,710,577,795.52
  5. Step 5: Solve for x
    x = 158,710,577,795.52/519,287.20
  6. Step 6: Final answer
    x = 305,631.60

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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.