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Finding the Fourth Proportional to 519,874.30, 779,811.45 and 125,890.30

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Solution

The fourth proportional to 519,874.30, 779,811.45 and 125,890.30 is: 188,835.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,874.30 : 779,811.45 = 125,890.30 : x
  2. Step 2: Convert to fraction form
    519,874.30/779,811.45 = 125,890.30/x
  3. Step 3: Cross multiply
    519,874.30x = 779,811.45 × 125,890.30
  4. Step 4: Simplify right side
    519,874.30x = 98,170,697,383.94
  5. Step 5: Solve for x
    x = 98,170,697,383.94/519,874.30
  6. Step 6: Final answer
    x = 188,835.45

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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.