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Finding the Fourth Proportional to 636.49, 956.33 and 405.48

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Solution

The fourth proportional to 636.49, 956.33 and 405.48 is: 609.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.49 : 956.33 = 405.48 : x
  2. Step 2: Convert to fraction form
    636.49/956.33 = 405.48/x
  3. Step 3: Cross multiply
    636.49x = 956.33 × 405.48
  4. Step 4: Simplify right side
    636.49x = 387,770.66
  5. Step 5: Solve for x
    x = 387,770.66/636.49
  6. Step 6: Final answer
    x = 609.24

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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.