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Finding the Fourth Proportional to 229.18, 343.80 and 113.60

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Solution

The fourth proportional to 229.18, 343.80 and 113.60 is: 170.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.18 : 343.80 = 113.60 : x
  2. Step 2: Convert to fraction form
    229.18/343.80 = 113.60/x
  3. Step 3: Cross multiply
    229.18x = 343.80 × 113.60
  4. Step 4: Simplify right side
    229.18x = 39,055.68
  5. Step 5: Solve for x
    x = 39,055.68/229.18
  6. Step 6: Final answer
    x = 170.41

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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.