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Finding the Fourth Proportional to 319.92, 480.36 and 227.76

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Solution

The fourth proportional to 319.92, 480.36 and 227.76 is: 341.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.92 : 480.36 = 227.76 : x
  2. Step 2: Convert to fraction form
    319.92/480.36 = 227.76/x
  3. Step 3: Cross multiply
    319.92x = 480.36 × 227.76
  4. Step 4: Simplify right side
    319.92x = 109,406.79
  5. Step 5: Solve for x
    x = 109,406.79/319.92
  6. Step 6: Final answer
    x = 341.98

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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.