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Finding the Fourth Proportional to 351,716.31, 485,304.60 and 196,670.40

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Solution

The fourth proportional to 351,716.31, 485,304.60 and 196,670.40 is: 271,369.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,716.31 : 485,304.60 = 196,670.40 : x
  2. Step 2: Convert to fraction form
    351,716.31/485,304.60 = 196,670.40/x
  3. Step 3: Cross multiply
    351,716.31x = 485,304.60 × 196,670.40
  4. Step 4: Simplify right side
    351,716.31x = 95,445,049,803.84
  5. Step 5: Solve for x
    x = 95,445,049,803.84/351,716.31
  6. Step 6: Final answer
    x = 271,369.42

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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.