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Finding the Fourth Proportional to 326.80, 451 and 186.94

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Solution

The fourth proportional to 326.80, 451 and 186.94 is: 257.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.80 : 451 = 186.94 : x
  2. Step 2: Convert to fraction form
    326.80/451 = 186.94/x
  3. Step 3: Cross multiply
    326.80x = 451 × 186.94
  4. Step 4: Simplify right side
    326.80x = 84,309.94
  5. Step 5: Solve for x
    x = 84,309.94/326.80
  6. Step 6: Final answer
    x = 257.99

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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.