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Finding the Fourth Proportional to 519,221.60, 778,832.40 and 239,285.60

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Solution

The fourth proportional to 519,221.60, 778,832.40 and 239,285.60 is: 358,928.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,221.60 : 778,832.40 = 239,285.60 : x
  2. Step 2: Convert to fraction form
    519,221.60/778,832.40 = 239,285.60/x
  3. Step 3: Cross multiply
    519,221.60x = 778,832.40 × 239,285.60
  4. Step 4: Simplify right side
    519,221.60x = 186,363,378,133.44
  5. Step 5: Solve for x
    x = 186,363,378,133.44/519,221.60
  6. Step 6: Final answer
    x = 358,928.40

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Half scale
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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.