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Finding the Fourth Proportional to 539.38, 808.60 and 214.54

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Solution

The fourth proportional to 539.38, 808.60 and 214.54 is: 321.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.38 : 808.60 = 214.54 : x
  2. Step 2: Convert to fraction form
    539.38/808.60 = 214.54/x
  3. Step 3: Cross multiply
    539.38x = 808.60 × 214.54
  4. Step 4: Simplify right side
    539.38x = 173,477.04
  5. Step 5: Solve for x
    x = 173,477.04/539.38
  6. Step 6: Final answer
    x = 321.62

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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.