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Finding the Fourth Proportional to 228.80, 342.56 and 137.54

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Solution

The fourth proportional to 228.80, 342.56 and 137.54 is: 205.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.80 : 342.56 = 137.54 : x
  2. Step 2: Convert to fraction form
    228.80/342.56 = 137.54/x
  3. Step 3: Cross multiply
    228.80x = 342.56 × 137.54
  4. Step 4: Simplify right side
    228.80x = 47,115.70
  5. Step 5: Solve for x
    x = 47,115.70/228.80
  6. Step 6: Final answer
    x = 205.93

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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.