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Finding the Fourth Proportional to 438.39, 604.97 and 239.22

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Solution

The fourth proportional to 438.39, 604.97 and 239.22 is: 330.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.39 : 604.97 = 239.22 : x
  2. Step 2: Convert to fraction form
    438.39/604.97 = 239.22/x
  3. Step 3: Cross multiply
    438.39x = 604.97 × 239.22
  4. Step 4: Simplify right side
    438.39x = 144,716.70
  5. Step 5: Solve for x
    x = 144,716.70/438.39
  6. Step 6: Final answer
    x = 330.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.