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Finding the Fourth Proportional to 229.42, 342.91 and 199.91

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Solution

The fourth proportional to 229.42, 342.91 and 199.91 is: 298.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.42 : 342.91 = 199.91 : x
  2. Step 2: Convert to fraction form
    229.42/342.91 = 199.91/x
  3. Step 3: Cross multiply
    229.42x = 342.91 × 199.91
  4. Step 4: Simplify right side
    229.42x = 68,550.14
  5. Step 5: Solve for x
    x = 68,550.14/229.42
  6. Step 6: Final answer
    x = 298.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.