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Finding the Fourth Proportional to 663.49, 995.13 and 252.64

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Solution

The fourth proportional to 663.49, 995.13 and 252.64 is: 378.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.49 : 995.13 = 252.64 : x
  2. Step 2: Convert to fraction form
    663.49/995.13 = 252.64/x
  3. Step 3: Cross multiply
    663.49x = 995.13 × 252.64
  4. Step 4: Simplify right side
    663.49x = 251,409.64
  5. Step 5: Solve for x
    x = 251,409.64/663.49
  6. Step 6: Final answer
    x = 378.92

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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.