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Finding the Fourth Proportional to 499.18, 688.74 and 324.49

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Solution

The fourth proportional to 499.18, 688.74 and 324.49 is: 447.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.18 : 688.74 = 324.49 : x
  2. Step 2: Convert to fraction form
    499.18/688.74 = 324.49/x
  3. Step 3: Cross multiply
    499.18x = 688.74 × 324.49
  4. Step 4: Simplify right side
    499.18x = 223,489.24
  5. Step 5: Solve for x
    x = 223,489.24/499.18
  6. Step 6: Final answer
    x = 447.71

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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.