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Finding the Fourth Proportional to 228.56, 343.01 and 84.29

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Solution

The fourth proportional to 228.56, 343.01 and 84.29 is: 126.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.56 : 343.01 = 84.29 : x
  2. Step 2: Convert to fraction form
    228.56/343.01 = 84.29/x
  3. Step 3: Cross multiply
    228.56x = 343.01 × 84.29
  4. Step 4: Simplify right side
    228.56x = 28,913.38
  5. Step 5: Solve for x
    x = 28,913.38/228.56
  6. Step 6: Final answer
    x = 126.50

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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.