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Finding the Fourth Proportional to 349.49, 482.40 and 238.92

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Solution

The fourth proportional to 349.49, 482.40 and 238.92 is: 329.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.49 : 482.40 = 238.92 : x
  2. Step 2: Convert to fraction form
    349.49/482.40 = 238.92/x
  3. Step 3: Cross multiply
    349.49x = 482.40 × 238.92
  4. Step 4: Simplify right side
    349.49x = 115,255.01
  5. Step 5: Solve for x
    x = 115,255.01/349.49
  6. Step 6: Final answer
    x = 329.79

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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.