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Finding the Fourth Proportional to 229.47, 344.32 and 121.23

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Solution

The fourth proportional to 229.47, 344.32 and 121.23 is: 181.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.47 : 344.32 = 121.23 : x
  2. Step 2: Convert to fraction form
    229.47/344.32 = 121.23/x
  3. Step 3: Cross multiply
    229.47x = 344.32 × 121.23
  4. Step 4: Simplify right side
    229.47x = 41,741.61
  5. Step 5: Solve for x
    x = 41,741.61/229.47
  6. Step 6: Final answer
    x = 181.91

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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.