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Finding the Fourth Proportional to 468.33, 646.56 and 321.18

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Solution

The fourth proportional to 468.33, 646.56 and 321.18 is: 443.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.33 : 646.56 = 321.18 : x
  2. Step 2: Convert to fraction form
    468.33/646.56 = 321.18/x
  3. Step 3: Cross multiply
    468.33x = 646.56 × 321.18
  4. Step 4: Simplify right side
    468.33x = 207,662.14
  5. Step 5: Solve for x
    x = 207,662.14/468.33
  6. Step 6: Final answer
    x = 443.41

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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.