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Finding the Fourth Proportional to 326.61, 450.72 and 186.69

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Solution

The fourth proportional to 326.61, 450.72 and 186.69 is: 257.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.61 : 450.72 = 186.69 : x
  2. Step 2: Convert to fraction form
    326.61/450.72 = 186.69/x
  3. Step 3: Cross multiply
    326.61x = 450.72 × 186.69
  4. Step 4: Simplify right side
    326.61x = 84,144.92
  5. Step 5: Solve for x
    x = 84,144.92/326.61
  6. Step 6: Final answer
    x = 257.63

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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.