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Finding the Fourth Proportional to 249.45, 343.50 and 228.66

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Solution

The fourth proportional to 249.45, 343.50 and 228.66 is: 314.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.45 : 343.50 = 228.66 : x
  2. Step 2: Convert to fraction form
    249.45/343.50 = 228.66/x
  3. Step 3: Cross multiply
    249.45x = 343.50 × 228.66
  4. Step 4: Simplify right side
    249.45x = 78,542.56
  5. Step 5: Solve for x
    x = 78,542.56/249.45
  6. Step 6: Final answer
    x = 314.87

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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.