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Finding the Fourth Proportional to 391,190.70, 587,174.85 and 191,736.30

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Solution

The fourth proportional to 391,190.70, 587,174.85 and 191,736.30 is: 287,795.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,190.70 : 587,174.85 = 191,736.30 : x
  2. Step 2: Convert to fraction form
    391,190.70/587,174.85 = 191,736.30/x
  3. Step 3: Cross multiply
    391,190.70x = 587,174.85 × 191,736.30
  4. Step 4: Simplify right side
    391,190.70x = 112,582,733,192.06
  5. Step 5: Solve for x
    x = 112,582,733,192.06/391,190.70
  6. Step 6: Final answer
    x = 287,795.01

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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.