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Finding the Fourth Proportional to 239.03, 360.33 and 218.53

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Solution

The fourth proportional to 239.03, 360.33 and 218.53 is: 329.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.03 : 360.33 = 218.53 : x
  2. Step 2: Convert to fraction form
    239.03/360.33 = 218.53/x
  3. Step 3: Cross multiply
    239.03x = 360.33 × 218.53
  4. Step 4: Simplify right side
    239.03x = 78,742.01
  5. Step 5: Solve for x
    x = 78,742.01/239.03
  6. Step 6: Final answer
    x = 329.42

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.