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Finding the Fourth Proportional to 321.92, 483.36 and 225.92

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Solution

The fourth proportional to 321.92, 483.36 and 225.92 is: 339.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.92 : 483.36 = 225.92 : x
  2. Step 2: Convert to fraction form
    321.92/483.36 = 225.92/x
  3. Step 3: Cross multiply
    321.92x = 483.36 × 225.92
  4. Step 4: Simplify right side
    321.92x = 109,200.69
  5. Step 5: Solve for x
    x = 109,200.69/321.92
  6. Step 6: Final answer
    x = 339.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.