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Finding the Fourth Proportional to 348.22, 521.42 and 239.78

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Solution

The fourth proportional to 348.22, 521.42 and 239.78 is: 359.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.22 : 521.42 = 239.78 : x
  2. Step 2: Convert to fraction form
    348.22/521.42 = 239.78/x
  3. Step 3: Cross multiply
    348.22x = 521.42 × 239.78
  4. Step 4: Simplify right side
    348.22x = 125,026.09
  5. Step 5: Solve for x
    x = 125,026.09/348.22
  6. Step 6: Final answer
    x = 359.04

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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.