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Finding the Fourth Proportional to 415,439.78, 622,910.59 and 190,518.50

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Solution

The fourth proportional to 415,439.78, 622,910.59 and 190,518.50 is: 285,663.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,439.78 : 622,910.59 = 190,518.50 : x
  2. Step 2: Convert to fraction form
    415,439.78/622,910.59 = 190,518.50/x
  3. Step 3: Cross multiply
    415,439.78x = 622,910.59 × 190,518.50
  4. Step 4: Simplify right side
    415,439.78x = 118,675,992,321.90
  5. Step 5: Solve for x
    x = 118,675,992,321.90/415,439.78
  6. Step 6: Final answer
    x = 285,663.53

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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.