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Finding the Fourth Proportional to 539.37, 808.11 and 431.82

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Solution

The fourth proportional to 539.37, 808.11 and 431.82 is: 646.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.37 : 808.11 = 431.82 : x
  2. Step 2: Convert to fraction form
    539.37/808.11 = 431.82/x
  3. Step 3: Cross multiply
    539.37x = 808.11 × 431.82
  4. Step 4: Simplify right side
    539.37x = 348,958.06
  5. Step 5: Solve for x
    x = 348,958.06/539.37
  6. Step 6: Final answer
    x = 646.97

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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.