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Finding the Fourth Proportional to 663.95, 996.23 and 253.18

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Solution

The fourth proportional to 663.95, 996.23 and 253.18 is: 379.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.95 : 996.23 = 253.18 : x
  2. Step 2: Convert to fraction form
    663.95/996.23 = 253.18/x
  3. Step 3: Cross multiply
    663.95x = 996.23 × 253.18
  4. Step 4: Simplify right side
    663.95x = 252,227.39
  5. Step 5: Solve for x
    x = 252,227.39/663.95
  6. Step 6: Final answer
    x = 379.89

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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.