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Finding the Fourth Proportional to 636.66, 955.25 and 343.81

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Solution

The fourth proportional to 636.66, 955.25 and 343.81 is: 515.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.66 : 955.25 = 343.81 : x
  2. Step 2: Convert to fraction form
    636.66/955.25 = 343.81/x
  3. Step 3: Cross multiply
    636.66x = 955.25 × 343.81
  4. Step 4: Simplify right side
    636.66x = 328,425.52
  5. Step 5: Solve for x
    x = 328,425.52/636.66
  6. Step 6: Final answer
    x = 515.86

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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.