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Finding the Fourth Proportional to 228.96, 343.43 and 84.57

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Solution

The fourth proportional to 228.96, 343.43 and 84.57 is: 126.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.96 : 343.43 = 84.57 : x
  2. Step 2: Convert to fraction form
    228.96/343.43 = 84.57/x
  3. Step 3: Cross multiply
    228.96x = 343.43 × 84.57
  4. Step 4: Simplify right side
    228.96x = 29,043.45
  5. Step 5: Solve for x
    x = 29,043.45/228.96
  6. Step 6: Final answer
    x = 126.85

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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.