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Finding the Fourth Proportional to 229.93, 344.81 and 67.61

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Solution

The fourth proportional to 229.93, 344.81 and 67.61 is: 101.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.93 : 344.81 = 67.61 : x
  2. Step 2: Convert to fraction form
    229.93/344.81 = 67.61/x
  3. Step 3: Cross multiply
    229.93x = 344.81 × 67.61
  4. Step 4: Simplify right side
    229.93x = 23,313.64
  5. Step 5: Solve for x
    x = 23,313.64/229.93
  6. Step 6: Final answer
    x = 101.40

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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.