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Finding the Fourth Proportional to 348.42, 481.31 and 278.22

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Solution

The fourth proportional to 348.42, 481.31 and 278.22 is: 384.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.42 : 481.31 = 278.22 : x
  2. Step 2: Convert to fraction form
    348.42/481.31 = 278.22/x
  3. Step 3: Cross multiply
    348.42x = 481.31 × 278.22
  4. Step 4: Simplify right side
    348.42x = 133,910.07
  5. Step 5: Solve for x
    x = 133,910.07/348.42
  6. Step 6: Final answer
    x = 384.34

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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.