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Finding the Fourth Proportional to 351,955.91, 485,692.81 and 198,991.46

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Solution

The fourth proportional to 351,955.91, 485,692.81 and 198,991.46 is: 274,604.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,955.91 : 485,692.81 = 198,991.46 : x
  2. Step 2: Convert to fraction form
    351,955.91/485,692.81 = 198,991.46/x
  3. Step 3: Cross multiply
    351,955.91x = 485,692.81 × 198,991.46
  4. Step 4: Simplify right side
    351,955.91x = 96,648,717,949.98
  5. Step 5: Solve for x
    x = 96,648,717,949.98/351,955.91
  6. Step 6: Final answer
    x = 274,604.62

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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.