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Finding the Fourth Proportional to 326.75, 450.89 and 186.87

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Solution

The fourth proportional to 326.75, 450.89 and 186.87 is: 257.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.75 : 450.89 = 186.87 : x
  2. Step 2: Convert to fraction form
    326.75/450.89 = 186.87/x
  3. Step 3: Cross multiply
    326.75x = 450.89 × 186.87
  4. Step 4: Simplify right side
    326.75x = 84,256.88
  5. Step 5: Solve for x
    x = 84,256.88/326.75
  6. Step 6: Final answer
    x = 257.87

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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.