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Finding the Fourth Proportional to 272,800.20, 409,005.90 and 122,917.80

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Solution

The fourth proportional to 272,800.20, 409,005.90 and 122,917.80 is: 184,289.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,800.20 : 409,005.90 = 122,917.80 : x
  2. Step 2: Convert to fraction form
    272,800.20/409,005.90 = 122,917.80/x
  3. Step 3: Cross multiply
    272,800.20x = 409,005.90 × 122,917.80
  4. Step 4: Simplify right side
    272,800.20x = 50,274,105,415.02
  5. Step 5: Solve for x
    x = 50,274,105,415.02/272,800.20
  6. Step 6: Final answer
    x = 184,289.11

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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.