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Finding the Fourth Proportional to 519,257.60, 778,886.40 and 239,321.60

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Solution

The fourth proportional to 519,257.60, 778,886.40 and 239,321.60 is: 358,982.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,257.60 : 778,886.40 = 239,321.60 : x
  2. Step 2: Convert to fraction form
    519,257.60/778,886.40 = 239,321.60/x
  3. Step 3: Cross multiply
    519,257.60x = 778,886.40 × 239,321.60
  4. Step 4: Simplify right side
    519,257.60x = 186,404,339,466.24
  5. Step 5: Solve for x
    x = 186,404,339,466.24/519,257.60
  6. Step 6: Final answer
    x = 358,982.40

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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.