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Finding the Fourth Proportional to 499.05, 688.55 and 324.39

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Solution

The fourth proportional to 499.05, 688.55 and 324.39 is: 447.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.05 : 688.55 = 324.39 : x
  2. Step 2: Convert to fraction form
    499.05/688.55 = 324.39/x
  3. Step 3: Cross multiply
    499.05x = 688.55 × 324.39
  4. Step 4: Simplify right side
    499.05x = 223,357.11
  5. Step 5: Solve for x
    x = 223,357.11/499.05
  6. Step 6: Final answer
    x = 447.56

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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.