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Finding the Fourth Proportional to 308.79, 462.38 and 216.99

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Solution

The fourth proportional to 308.79, 462.38 and 216.99 is: 324.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.79 : 462.38 = 216.99 : x
  2. Step 2: Convert to fraction form
    308.79/462.38 = 216.99/x
  3. Step 3: Cross multiply
    308.79x = 462.38 × 216.99
  4. Step 4: Simplify right side
    308.79x = 100,332.45
  5. Step 5: Solve for x
    x = 100,332.45/308.79
  6. Step 6: Final answer
    x = 324.92

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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.