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Finding the Fourth Proportional to 464.25, 639.56 and 324.12

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Solution

The fourth proportional to 464.25, 639.56 and 324.12 is: 446.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.25 : 639.56 = 324.12 : x
  2. Step 2: Convert to fraction form
    464.25/639.56 = 324.12/x
  3. Step 3: Cross multiply
    464.25x = 639.56 × 324.12
  4. Step 4: Simplify right side
    464.25x = 207,290.18
  5. Step 5: Solve for x
    x = 207,290.18/464.25
  6. Step 6: Final answer
    x = 446.51

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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.