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Finding the Fourth Proportional to 468.73, 646.44 and 321.13

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Solution

The fourth proportional to 468.73, 646.44 and 321.13 is: 442.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.73 : 646.44 = 321.13 : x
  2. Step 2: Convert to fraction form
    468.73/646.44 = 321.13/x
  3. Step 3: Cross multiply
    468.73x = 646.44 × 321.13
  4. Step 4: Simplify right side
    468.73x = 207,591.28
  5. Step 5: Solve for x
    x = 207,591.28/468.73
  6. Step 6: Final answer
    x = 442.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.