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Finding the Fourth Proportional to 421,958.19, 582,341.90 and 252,188.67

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Solution

The fourth proportional to 421,958.19, 582,341.90 and 252,188.67 is: 348,044.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,958.19 : 582,341.90 = 252,188.67 : x
  2. Step 2: Convert to fraction form
    421,958.19/582,341.90 = 252,188.67/x
  3. Step 3: Cross multiply
    421,958.19x = 582,341.90 × 252,188.67
  4. Step 4: Simplify right side
    421,958.19x = 146,860,027,985.33
  5. Step 5: Solve for x
    x = 146,860,027,985.33/421,958.19
  6. Step 6: Final answer
    x = 348,044.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.