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Finding the Fourth Proportional to 258.28, 385.44 and 230.95

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Solution

The fourth proportional to 258.28, 385.44 and 230.95 is: 344.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.28 : 385.44 = 230.95 : x
  2. Step 2: Convert to fraction form
    258.28/385.44 = 230.95/x
  3. Step 3: Cross multiply
    258.28x = 385.44 × 230.95
  4. Step 4: Simplify right side
    258.28x = 89,017.37
  5. Step 5: Solve for x
    x = 89,017.37/258.28
  6. Step 6: Final answer
    x = 344.65

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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.