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Finding the Fourth Proportional to 539.25, 808.47 and 214.71

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Solution

The fourth proportional to 539.25, 808.47 and 214.71 is: 321.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.25 : 808.47 = 214.71 : x
  2. Step 2: Convert to fraction form
    539.25/808.47 = 214.71/x
  3. Step 3: Cross multiply
    539.25x = 808.47 × 214.71
  4. Step 4: Simplify right side
    539.25x = 173,586.59
  5. Step 5: Solve for x
    x = 173,586.59/539.25
  6. Step 6: Final answer
    x = 321.90

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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.