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Finding the Fourth Proportional to 351,690.93, 485,326.78 and 196,641.54

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Solution

The fourth proportional to 351,690.93, 485,326.78 and 196,641.54 is: 271,361.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,690.93 : 485,326.78 = 196,641.54 : x
  2. Step 2: Convert to fraction form
    351,690.93/485,326.78 = 196,641.54/x
  3. Step 3: Cross multiply
    351,690.93x = 485,326.78 × 196,641.54
  4. Step 4: Simplify right side
    351,690.93x = 95,435,404,930.84
  5. Step 5: Solve for x
    x = 95,435,404,930.84/351,690.93
  6. Step 6: Final answer
    x = 271,361.58

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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.