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Finding the Fourth Proportional to 360.79, 539.97 and 216.61

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Solution

The fourth proportional to 360.79, 539.97 and 216.61 is: 324.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.79 : 539.97 = 216.61 : x
  2. Step 2: Convert to fraction form
    360.79/539.97 = 216.61/x
  3. Step 3: Cross multiply
    360.79x = 539.97 × 216.61
  4. Step 4: Simplify right side
    360.79x = 116,960.74
  5. Step 5: Solve for x
    x = 116,960.74/360.79
  6. Step 6: Final answer
    x = 324.18

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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.