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Finding the Fourth Proportional to 249.50, 342.44 and 228.72

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Solution

The fourth proportional to 249.50, 342.44 and 228.72 is: 313.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.50 : 342.44 = 228.72 : x
  2. Step 2: Convert to fraction form
    249.50/342.44 = 228.72/x
  3. Step 3: Cross multiply
    249.50x = 342.44 × 228.72
  4. Step 4: Simplify right side
    249.50x = 78,325.16
  5. Step 5: Solve for x
    x = 78,325.16/249.50
  6. Step 6: Final answer
    x = 313.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.