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Finding the Fourth Proportional to 351,956.41, 485,693.50 and 198,991.96

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Solution

The fourth proportional to 351,956.41, 485,693.50 and 198,991.96 is: 274,605.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,956.41 : 485,693.50 = 198,991.96 : x
  2. Step 2: Convert to fraction form
    351,956.41/485,693.50 = 198,991.96/x
  3. Step 3: Cross multiply
    351,956.41x = 485,693.50 × 198,991.96
  4. Step 4: Simplify right side
    351,956.41x = 96,649,098,100.83
  5. Step 5: Solve for x
    x = 96,649,098,100.83/351,956.41
  6. Step 6: Final answer
    x = 274,605.31

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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.