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Finding the Fourth Proportional to 229.91, 344.99 and 211.55

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Solution

The fourth proportional to 229.91, 344.99 and 211.55 is: 317.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.91 : 344.99 = 211.55 : x
  2. Step 2: Convert to fraction form
    229.91/344.99 = 211.55/x
  3. Step 3: Cross multiply
    229.91x = 344.99 × 211.55
  4. Step 4: Simplify right side
    229.91x = 72,981.44
  5. Step 5: Solve for x
    x = 72,981.44/229.91
  6. Step 6: Final answer
    x = 317.44

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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.