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Finding the Fourth Proportional to 229.12, 342.59 and 154.78

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Solution

The fourth proportional to 229.12, 342.59 and 154.78 is: 231.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.12 : 342.59 = 154.78 : x
  2. Step 2: Convert to fraction form
    229.12/342.59 = 154.78/x
  3. Step 3: Cross multiply
    229.12x = 342.59 × 154.78
  4. Step 4: Simplify right side
    229.12x = 53,024.37
  5. Step 5: Solve for x
    x = 53,024.37/229.12
  6. Step 6: Final answer
    x = 231.43

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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.