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Finding the Fourth Proportional to 636.77, 955.12 and 203.90

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Solution

The fourth proportional to 636.77, 955.12 and 203.90 is: 305.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.77 : 955.12 = 203.90 : x
  2. Step 2: Convert to fraction form
    636.77/955.12 = 203.90/x
  3. Step 3: Cross multiply
    636.77x = 955.12 × 203.90
  4. Step 4: Simplify right side
    636.77x = 194,743.68
  5. Step 5: Solve for x
    x = 194,743.68/636.77
  6. Step 6: Final answer
    x = 305.83

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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.