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Finding the Fourth Proportional to 663.92, 995.20 and 230.72

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Solution

The fourth proportional to 663.92, 995.20 and 230.72 is: 345.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.92 : 995.20 = 230.72 : x
  2. Step 2: Convert to fraction form
    663.92/995.20 = 230.72/x
  3. Step 3: Cross multiply
    663.92x = 995.20 × 230.72
  4. Step 4: Simplify right side
    663.92x = 229,612.54
  5. Step 5: Solve for x
    x = 229,612.54/663.92
  6. Step 6: Final answer
    x = 345.84

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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.