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Finding the Fourth Proportional to 539.03, 808.65 and 214.43

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Solution

The fourth proportional to 539.03, 808.65 and 214.43 is: 321.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.03 : 808.65 = 214.43 : x
  2. Step 2: Convert to fraction form
    539.03/808.65 = 214.43/x
  3. Step 3: Cross multiply
    539.03x = 808.65 × 214.43
  4. Step 4: Simplify right side
    539.03x = 173,394.78
  5. Step 5: Solve for x
    x = 173,394.78/539.03
  6. Step 6: Final answer
    x = 321.68

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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.