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Finding the Fourth Proportional to 519,237.70, 778,856.55 and 219,618.70

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Solution

The fourth proportional to 519,237.70, 778,856.55 and 219,618.70 is: 329,428.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,237.70 : 778,856.55 = 219,618.70 : x
  2. Step 2: Convert to fraction form
    519,237.70/778,856.55 = 219,618.70/x
  3. Step 3: Cross multiply
    519,237.70x = 778,856.55 × 219,618.70
  4. Step 4: Simplify right side
    519,237.70x = 171,051,462,997.49
  5. Step 5: Solve for x
    x = 171,051,462,997.49/519,237.70
  6. Step 6: Final answer
    x = 329,428.05

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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.