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Finding the Fourth Proportional to 286.32, 428.92 and 228.66

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Solution

The fourth proportional to 286.32, 428.92 and 228.66 is: 342.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.32 : 428.92 = 228.66 : x
  2. Step 2: Convert to fraction form
    286.32/428.92 = 228.66/x
  3. Step 3: Cross multiply
    286.32x = 428.92 × 228.66
  4. Step 4: Simplify right side
    286.32x = 98,076.85
  5. Step 5: Solve for x
    x = 98,076.85/286.32
  6. Step 6: Final answer
    x = 342.54

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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.