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Finding the Fourth Proportional to 404.08, 556.41 and 394.96

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Solution

The fourth proportional to 404.08, 556.41 and 394.96 is: 543.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.08 : 556.41 = 394.96 : x
  2. Step 2: Convert to fraction form
    404.08/556.41 = 394.96/x
  3. Step 3: Cross multiply
    404.08x = 556.41 × 394.96
  4. Step 4: Simplify right side
    404.08x = 219,759.69
  5. Step 5: Solve for x
    x = 219,759.69/404.08
  6. Step 6: Final answer
    x = 543.85

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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.