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Finding the Fourth Proportional to 326.62, 450.70 and 202.20

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Solution

The fourth proportional to 326.62, 450.70 and 202.20 is: 279.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.62 : 450.70 = 202.20 : x
  2. Step 2: Convert to fraction form
    326.62/450.70 = 202.20/x
  3. Step 3: Cross multiply
    326.62x = 450.70 × 202.20
  4. Step 4: Simplify right side
    326.62x = 91,131.54
  5. Step 5: Solve for x
    x = 91,131.54/326.62
  6. Step 6: Final answer
    x = 279.01

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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.