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Finding the Fourth Proportional to 342.05, 471.56 and 326.72

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Solution

The fourth proportional to 342.05, 471.56 and 326.72 is: 450.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.05 : 471.56 = 326.72 : x
  2. Step 2: Convert to fraction form
    342.05/471.56 = 326.72/x
  3. Step 3: Cross multiply
    342.05x = 471.56 × 326.72
  4. Step 4: Simplify right side
    342.05x = 154,067.63
  5. Step 5: Solve for x
    x = 154,067.63/342.05
  6. Step 6: Final answer
    x = 450.43

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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.