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Finding the Fourth Proportional to 636.76, 955.50 and 312.44

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Solution

The fourth proportional to 636.76, 955.50 and 312.44 is: 468.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.76 : 955.50 = 312.44 : x
  2. Step 2: Convert to fraction form
    636.76/955.50 = 312.44/x
  3. Step 3: Cross multiply
    636.76x = 955.50 × 312.44
  4. Step 4: Simplify right side
    636.76x = 298,536.42
  5. Step 5: Solve for x
    x = 298,536.42/636.76
  6. Step 6: Final answer
    x = 468.84

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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.