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Finding the Fourth Proportional to 636.12, 955.04 and 440.65

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Solution

The fourth proportional to 636.12, 955.04 and 440.65 is: 661.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.12 : 955.04 = 440.65 : x
  2. Step 2: Convert to fraction form
    636.12/955.04 = 440.65/x
  3. Step 3: Cross multiply
    636.12x = 955.04 × 440.65
  4. Step 4: Simplify right side
    636.12x = 420,838.38
  5. Step 5: Solve for x
    x = 420,838.38/636.12
  6. Step 6: Final answer
    x = 661.57

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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.