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Finding the Fourth Proportional to 538.43, 805.77 and 439.79

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Solution

The fourth proportional to 538.43, 805.77 and 439.79 is: 658.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.43 : 805.77 = 439.79 : x
  2. Step 2: Convert to fraction form
    538.43/805.77 = 439.79/x
  3. Step 3: Cross multiply
    538.43x = 805.77 × 439.79
  4. Step 4: Simplify right side
    538.43x = 354,365.56
  5. Step 5: Solve for x
    x = 354,365.56/538.43
  6. Step 6: Final answer
    x = 658.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.