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Finding the Fourth Proportional to 321,067.79, 443,076.80 and 193,718.78

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Solution

The fourth proportional to 321,067.79, 443,076.80 and 193,718.78 is: 267,333.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,067.79 : 443,076.80 = 193,718.78 : x
  2. Step 2: Convert to fraction form
    321,067.79/443,076.80 = 193,718.78/x
  3. Step 3: Cross multiply
    321,067.79x = 443,076.80 × 193,718.78
  4. Step 4: Simplify right side
    321,067.79x = 85,832,296,495.08
  5. Step 5: Solve for x
    x = 85,832,296,495.08/321,067.79
  6. Step 6: Final answer
    x = 267,333.88

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1.5x scale

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.