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Finding the Fourth Proportional to 404.08, 557.12 and 273.28

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Solution

The fourth proportional to 404.08, 557.12 and 273.28 is: 376.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.08 : 557.12 = 273.28 : x
  2. Step 2: Convert to fraction form
    404.08/557.12 = 273.28/x
  3. Step 3: Cross multiply
    404.08x = 557.12 × 273.28
  4. Step 4: Simplify right side
    404.08x = 152,249.75
  5. Step 5: Solve for x
    x = 152,249.75/404.08
  6. Step 6: Final answer
    x = 376.78

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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.