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Finding the Fourth Proportional to 230.28, 345.78 and 192.12

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Solution

The fourth proportional to 230.28, 345.78 and 192.12 is: 288.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.28 : 345.78 = 192.12 : x
  2. Step 2: Convert to fraction form
    230.28/345.78 = 192.12/x
  3. Step 3: Cross multiply
    230.28x = 345.78 × 192.12
  4. Step 4: Simplify right side
    230.28x = 66,431.25
  5. Step 5: Solve for x
    x = 66,431.25/230.28
  6. Step 6: Final answer
    x = 288.48

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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.