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Finding the Fourth Proportional to 636.34, 953.72 and 327.72

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Solution

The fourth proportional to 636.34, 953.72 and 327.72 is: 491.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.34 : 953.72 = 327.72 : x
  2. Step 2: Convert to fraction form
    636.34/953.72 = 327.72/x
  3. Step 3: Cross multiply
    636.34x = 953.72 × 327.72
  4. Step 4: Simplify right side
    636.34x = 312,553.12
  5. Step 5: Solve for x
    x = 312,553.12/636.34
  6. Step 6: Final answer
    x = 491.17

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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.