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Finding the Fourth Proportional to 326.82, 450.78 and 307.23

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Solution

The fourth proportional to 326.82, 450.78 and 307.23 is: 423.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.82 : 450.78 = 307.23 : x
  2. Step 2: Convert to fraction form
    326.82/450.78 = 307.23/x
  3. Step 3: Cross multiply
    326.82x = 450.78 × 307.23
  4. Step 4: Simplify right side
    326.82x = 138,493.14
  5. Step 5: Solve for x
    x = 138,493.14/326.82
  6. Step 6: Final answer
    x = 423.76

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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.