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Finding the Fourth Proportional to 326, 449.60 and 284.56

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Solution

The fourth proportional to 326, 449.60 and 284.56 is: 392.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    326 : 449.60 = 284.56 : x
  2. Step 2: Convert to fraction form
    326/449.60 = 284.56/x
  3. Step 3: Cross multiply
    326x = 449.60 × 284.56
  4. Step 4: Simplify right side
    326x = 127,938.18
  5. Step 5: Solve for x
    x = 127,938.18/326
  6. Step 6: Final answer
    x = 392.45

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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.