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Finding the Fourth Proportional to 229.64, 316.76 and 142.26

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Solution

The fourth proportional to 229.64, 316.76 and 142.26 is: 196.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.64 : 316.76 = 142.26 : x
  2. Step 2: Convert to fraction form
    229.64/316.76 = 142.26/x
  3. Step 3: Cross multiply
    229.64x = 316.76 × 142.26
  4. Step 4: Simplify right side
    229.64x = 45,062.28
  5. Step 5: Solve for x
    x = 45,062.28/229.64
  6. Step 6: Final answer
    x = 196.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.