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Finding the Fourth Proportional to 636.64, 955.07 and 328.41

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Solution

The fourth proportional to 636.64, 955.07 and 328.41 is: 492.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.64 : 955.07 = 328.41 : x
  2. Step 2: Convert to fraction form
    636.64/955.07 = 328.41/x
  3. Step 3: Cross multiply
    636.64x = 955.07 × 328.41
  4. Step 4: Simplify right side
    636.64x = 313,652.97
  5. Step 5: Solve for x
    x = 313,652.97/636.64
  6. Step 6: Final answer
    x = 492.67

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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.