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Finding the Fourth Proportional to 326.70, 450.80 and 186.87

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Solution

The fourth proportional to 326.70, 450.80 and 186.87 is: 257.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.70 : 450.80 = 186.87 : x
  2. Step 2: Convert to fraction form
    326.70/450.80 = 186.87/x
  3. Step 3: Cross multiply
    326.70x = 450.80 × 186.87
  4. Step 4: Simplify right side
    326.70x = 84,240.06
  5. Step 5: Solve for x
    x = 84,240.06/326.70
  6. Step 6: Final answer
    x = 257.86

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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.