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Finding the Fourth Proportional to 404.37, 558.77 and 287.73

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Solution

The fourth proportional to 404.37, 558.77 and 287.73 is: 397.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.37 : 558.77 = 287.73 : x
  2. Step 2: Convert to fraction form
    404.37/558.77 = 287.73/x
  3. Step 3: Cross multiply
    404.37x = 558.77 × 287.73
  4. Step 4: Simplify right side
    404.37x = 160,773.45
  5. Step 5: Solve for x
    x = 160,773.45/404.37
  6. Step 6: Final answer
    x = 397.59

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.