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Finding the Fourth Proportional to 362.79, 542.96 and 218.61

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Solution

The fourth proportional to 362.79, 542.96 and 218.61 is: 327.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    362.79 : 542.96 = 218.61 : x
  2. Step 2: Convert to fraction form
    362.79/542.96 = 218.61/x
  3. Step 3: Cross multiply
    362.79x = 542.96 × 218.61
  4. Step 4: Simplify right side
    362.79x = 118,696.49
  5. Step 5: Solve for x
    x = 118,696.49/362.79
  6. Step 6: Final answer
    x = 327.18

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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.