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Finding the Fourth Proportional to 230.31, 343.25 and 228.40

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Solution

The fourth proportional to 230.31, 343.25 and 228.40 is: 340.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.31 : 343.25 = 228.40 : x
  2. Step 2: Convert to fraction form
    230.31/343.25 = 228.40/x
  3. Step 3: Cross multiply
    230.31x = 343.25 × 228.40
  4. Step 4: Simplify right side
    230.31x = 78,400.37
  5. Step 5: Solve for x
    x = 78,400.37/230.31
  6. Step 6: Final answer
    x = 340.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.