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Finding the Fourth Proportional to 445.11, 613.51 and 351.69

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Solution

The fourth proportional to 445.11, 613.51 and 351.69 is: 484.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.11 : 613.51 = 351.69 : x
  2. Step 2: Convert to fraction form
    445.11/613.51 = 351.69/x
  3. Step 3: Cross multiply
    445.11x = 613.51 × 351.69
  4. Step 4: Simplify right side
    445.11x = 215,765.33
  5. Step 5: Solve for x
    x = 215,765.33/445.11
  6. Step 6: Final answer
    x = 484.75

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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.