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Finding the Fourth Proportional to 539.44, 809.42 and 214.72

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Solution

The fourth proportional to 539.44, 809.42 and 214.72 is: 322.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.44 : 809.42 = 214.72 : x
  2. Step 2: Convert to fraction form
    539.44/809.42 = 214.72/x
  3. Step 3: Cross multiply
    539.44x = 809.42 × 214.72
  4. Step 4: Simplify right side
    539.44x = 173,795.57
  5. Step 5: Solve for x
    x = 173,795.57/539.44
  6. Step 6: Final answer
    x = 322.18

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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.