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Finding the Fourth Proportional to 613.08, 920.43 and 324.72

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Solution

The fourth proportional to 613.08, 920.43 and 324.72 is: 487.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.08 : 920.43 = 324.72 : x
  2. Step 2: Convert to fraction form
    613.08/920.43 = 324.72/x
  3. Step 3: Cross multiply
    613.08x = 920.43 × 324.72
  4. Step 4: Simplify right side
    613.08x = 298,882.03
  5. Step 5: Solve for x
    x = 298,882.03/613.08
  6. Step 6: Final answer
    x = 487.51

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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.