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Finding the Fourth Proportional to 325.68, 447.02 and 289.92

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Solution

The fourth proportional to 325.68, 447.02 and 289.92 is: 397.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.68 : 447.02 = 289.92 : x
  2. Step 2: Convert to fraction form
    325.68/447.02 = 289.92/x
  3. Step 3: Cross multiply
    325.68x = 447.02 × 289.92
  4. Step 4: Simplify right side
    325.68x = 129,600.04
  5. Step 5: Solve for x
    x = 129,600.04/325.68
  6. Step 6: Final answer
    x = 397.94

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.