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Finding the Fourth Proportional to 646.38, 968.85 and 321.54

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Solution

The fourth proportional to 646.38, 968.85 and 321.54 is: 481.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.38 : 968.85 = 321.54 : x
  2. Step 2: Convert to fraction form
    646.38/968.85 = 321.54/x
  3. Step 3: Cross multiply
    646.38x = 968.85 × 321.54
  4. Step 4: Simplify right side
    646.38x = 311,524.03
  5. Step 5: Solve for x
    x = 311,524.03/646.38
  6. Step 6: Final answer
    x = 481.95

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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.