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Finding the Fourth Proportional to 326.61, 449.67 and 261

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Solution

The fourth proportional to 326.61, 449.67 and 261 is: 359.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.61 : 449.67 = 261 : x
  2. Step 2: Convert to fraction form
    326.61/449.67 = 261/x
  3. Step 3: Cross multiply
    326.61x = 449.67 × 261
  4. Step 4: Simplify right side
    326.61x = 117,363.87
  5. Step 5: Solve for x
    x = 117,363.87/326.61
  6. Step 6: Final answer
    x = 359.34

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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.