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Finding the Fourth Proportional to 326.62, 450.82 and 202.21

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Solution

The fourth proportional to 326.62, 450.82 and 202.21 is: 279.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.62 : 450.82 = 202.21 : x
  2. Step 2: Convert to fraction form
    326.62/450.82 = 202.21/x
  3. Step 3: Cross multiply
    326.62x = 450.82 × 202.21
  4. Step 4: Simplify right side
    326.62x = 91,158.06
  5. Step 5: Solve for x
    x = 91,158.06/326.62
  6. Step 6: Final answer
    x = 279.10

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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.