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Finding the Fourth Proportional to 229.05, 316.08 and 130.79

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Solution

The fourth proportional to 229.05, 316.08 and 130.79 is: 180.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.05 : 316.08 = 130.79 : x
  2. Step 2: Convert to fraction form
    229.05/316.08 = 130.79/x
  3. Step 3: Cross multiply
    229.05x = 316.08 × 130.79
  4. Step 4: Simplify right side
    229.05x = 41,340.89
  5. Step 5: Solve for x
    x = 41,340.89/229.05
  6. Step 6: Final answer
    x = 180.49

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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.